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Disabling auto-refresh of game list by default, as it is causing bugs sometimes
[open-ps2-loader.git] / thirdparty / freetype-2.3.12 / src / psaux / t1decode.c
blob31554ff1ba7f09be143ac4418309098815912fff
1 /***************************************************************************/
2 /* */
3 /* t1decode.c */
4 /* */
5 /* PostScript Type 1 decoding routines (body). */
6 /* */
7 /* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 */
8 /* 2010 by */
9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
10 /* */
11 /* This file is part of the FreeType project, and may only be used, */
12 /* modified, and distributed under the terms of the FreeType project */
13 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
14 /* this file you indicate that you have read the license and */
15 /* understand and accept it fully. */
16 /* */
17 /***************************************************************************/
18
19
20 #include <ft2build.h>
21 #include FT_INTERNAL_CALC_H
22 #include FT_INTERNAL_DEBUG_H
23 #include FT_INTERNAL_POSTSCRIPT_HINTS_H
24 #include FT_OUTLINE_H
25
26 #include "t1decode.h"
27 #include "psobjs.h"
28
29 #include "psauxerr.h"
30
31
32 /*************************************************************************/
33 /* */
34 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
35 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
36 /* messages during execution. */
37 /* */
38 #undef FT_COMPONENT
39 #define FT_COMPONENT trace_t1decode
40
41
42 typedef enum T1_Operator_
43 {
44 op_none = 0,
45 op_endchar,
46 op_hsbw,
47 op_seac,
48 op_sbw,
49 op_closepath,
50 op_hlineto,
51 op_hmoveto,
52 op_hvcurveto,
53 op_rlineto,
54 op_rmoveto,
55 op_rrcurveto,
56 op_vhcurveto,
57 op_vlineto,
58 op_vmoveto,
59 op_dotsection,
60 op_hstem,
61 op_hstem3,
62 op_vstem,
63 op_vstem3,
64 op_div,
65 op_callothersubr,
66 op_callsubr,
67 op_pop,
68 op_return,
69 op_setcurrentpoint,
70 op_unknown15,
71
72 op_max /* never remove this one */
73
74 } T1_Operator;
75
76
77 static
78 const FT_Int t1_args_count[op_max] =
79 {
80 0, /* none */
81 0, /* endchar */
82 2, /* hsbw */
83 5, /* seac */
84 4, /* sbw */
85 0, /* closepath */
86 1, /* hlineto */
87 1, /* hmoveto */
88 4, /* hvcurveto */
89 2, /* rlineto */
90 2, /* rmoveto */
91 6, /* rrcurveto */
92 4, /* vhcurveto */
93 1, /* vlineto */
94 1, /* vmoveto */
95 0, /* dotsection */
96 2, /* hstem */
97 6, /* hstem3 */
98 2, /* vstem */
99 6, /* vstem3 */
100 2, /* div */
101 -1, /* callothersubr */
102 1, /* callsubr */
103 0, /* pop */
104 0, /* return */
105 2, /* setcurrentpoint */
106 2 /* opcode 15 (undocumented and obsolete) */
107 };
108
109
110 /*************************************************************************/
111 /* */
112 /* <Function> */
113 /* t1_lookup_glyph_by_stdcharcode */
114 /* */
115 /* <Description> */
116 /* Looks up a given glyph by its StandardEncoding charcode. Used to */
117 /* implement the SEAC Type 1 operator. */
118 /* */
119 /* <Input> */
120 /* face :: The current face object. */
121 /* */
122 /* charcode :: The character code to look for. */
123 /* */
124 /* <Return> */
125 /* A glyph index in the font face. Returns -1 if the corresponding */
126 /* glyph wasn't found. */
127 /* */
128 static FT_Int
129 t1_lookup_glyph_by_stdcharcode( T1_Decoder decoder,
130 FT_Int charcode )
131 {
132 FT_UInt n;
133 const FT_String* glyph_name;
134 FT_Service_PsCMaps psnames = decoder->psnames;
135
136
137 /* check range of standard char code */
138 if ( charcode < 0 || charcode > 255 )
139 return -1;
140
141 glyph_name = psnames->adobe_std_strings(
142 psnames->adobe_std_encoding[charcode]);
143
144 for ( n = 0; n < decoder->num_glyphs; n++ )
145 {
146 FT_String* name = (FT_String*)decoder->glyph_names[n];
147
148
149 if ( name &&
150 name[0] == glyph_name[0] &&
151 ft_strcmp( name, glyph_name ) == 0 )
152 return n;
153 }
154
155 return -1;
156 }
157
158
159 /*************************************************************************/
160 /* */
161 /* <Function> */
162 /* t1operator_seac */
163 /* */
164 /* <Description> */
165 /* Implements the `seac' Type 1 operator for a Type 1 decoder. */
166 /* */
167 /* <Input> */
168 /* decoder :: The current CID decoder. */
169 /* */
170 /* asb :: The accent's side bearing. */
171 /* */
172 /* adx :: The horizontal offset of the accent. */
173 /* */
174 /* ady :: The vertical offset of the accent. */
175 /* */
176 /* bchar :: The base character's StandardEncoding charcode. */
177 /* */
178 /* achar :: The accent character's StandardEncoding charcode. */
179 /* */
180 /* <Return> */
181 /* FreeType error code. 0 means success. */
182 /* */
183 static FT_Error
184 t1operator_seac( T1_Decoder decoder,
185 FT_Pos asb,
186 FT_Pos adx,
187 FT_Pos ady,
188 FT_Int bchar,
189 FT_Int achar )
190 {
191 FT_Error error;
192 FT_Int bchar_index, achar_index;
193 #if 0
194 FT_Int n_base_points;
195 FT_Outline* base = decoder->builder.base;
196 #endif
197 FT_Vector left_bearing, advance;
198
199 #ifdef FT_CONFIG_OPTION_INCREMENTAL
200 T1_Face face = (T1_Face)decoder->builder.face;
201 #endif
202
203
204 if ( decoder->seac )
205 {
206 FT_ERROR(( "t1operator_seac: invalid nested seac\n" ));
207 return PSaux_Err_Syntax_Error;
208 }
209
210 /* seac weirdness */
211 adx += decoder->builder.left_bearing.x;
212
213 /* `glyph_names' is set to 0 for CID fonts which do not */
214 /* include an encoding. How can we deal with these? */
215 #ifdef FT_CONFIG_OPTION_INCREMENTAL
216 if ( decoder->glyph_names == 0 &&
217 !face->root.internal->incremental_interface )
218 #else
219 if ( decoder->glyph_names == 0 )
220 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
221 {
222 FT_ERROR(( "t1operator_seac:"
223 " glyph names table not available in this font\n" ));
224 return PSaux_Err_Syntax_Error;
225 }
226
227 #ifdef FT_CONFIG_OPTION_INCREMENTAL
228 if ( face->root.internal->incremental_interface )
229 {
230 /* the caller must handle the font encoding also */
231 bchar_index = bchar;
232 achar_index = achar;
233 }
234 else
235 #endif
236 {
237 bchar_index = t1_lookup_glyph_by_stdcharcode( decoder, bchar );
238 achar_index = t1_lookup_glyph_by_stdcharcode( decoder, achar );
239 }
240
241 if ( bchar_index < 0 || achar_index < 0 )
242 {
243 FT_ERROR(( "t1operator_seac:"
244 " invalid seac character code arguments\n" ));
245 return PSaux_Err_Syntax_Error;
246 }
247
248 /* if we are trying to load a composite glyph, do not load the */
249 /* accent character and return the array of subglyphs. */
250 if ( decoder->builder.no_recurse )
251 {
252 FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
253 FT_GlyphLoader loader = glyph->internal->loader;
254 FT_SubGlyph subg;
255
256
257 /* reallocate subglyph array if necessary */
258 error = FT_GlyphLoader_CheckSubGlyphs( loader, 2 );
259 if ( error )
260 goto Exit;
261
262 subg = loader->current.subglyphs;
263
264 /* subglyph 0 = base character */
265 subg->index = bchar_index;
266 subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES |
267 FT_SUBGLYPH_FLAG_USE_MY_METRICS;
268 subg->arg1 = 0;
269 subg->arg2 = 0;
270 subg++;
271
272 /* subglyph 1 = accent character */
273 subg->index = achar_index;
274 subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES;
275 subg->arg1 = (FT_Int)FIXED_TO_INT( adx - asb );
276 subg->arg2 = (FT_Int)FIXED_TO_INT( ady );
277
278 /* set up remaining glyph fields */
279 glyph->num_subglyphs = 2;
280 glyph->subglyphs = loader->base.subglyphs;
281 glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
282
283 loader->current.num_subglyphs = 2;
284 goto Exit;
285 }
286
287 /* First load `bchar' in builder */
288 /* now load the unscaled outline */
289
290 FT_GlyphLoader_Prepare( decoder->builder.loader ); /* prepare loader */
291
292 /* the seac operator must not be nested */
293 decoder->seac = TRUE;
294 error = t1_decoder_parse_glyph( decoder, bchar_index );
295 decoder->seac = FALSE;
296 if ( error )
297 goto Exit;
298
299 /* save the left bearing and width of the base character */
300 /* as they will be erased by the next load. */
301
302 left_bearing = decoder->builder.left_bearing;
303 advance = decoder->builder.advance;
304
305 decoder->builder.left_bearing.x = 0;
306 decoder->builder.left_bearing.y = 0;
307
308 decoder->builder.pos_x = adx - asb;
309 decoder->builder.pos_y = ady;
310
311 /* Now load `achar' on top of */
312 /* the base outline */
313
314 /* the seac operator must not be nested */
315 decoder->seac = TRUE;
316 error = t1_decoder_parse_glyph( decoder, achar_index );
317 decoder->seac = FALSE;
318 if ( error )
319 goto Exit;
320
321 /* restore the left side bearing and */
322 /* advance width of the base character */
323
324 decoder->builder.left_bearing = left_bearing;
325 decoder->builder.advance = advance;
326
327 decoder->builder.pos_x = 0;
328 decoder->builder.pos_y = 0;
329
330 Exit:
331 return error;
332 }
333
334
335 /*************************************************************************/
336 /* */
337 /* <Function> */
338 /* t1_decoder_parse_charstrings */
339 /* */
340 /* <Description> */
341 /* Parses a given Type 1 charstrings program. */
342 /* */
343 /* <Input> */
344 /* decoder :: The current Type 1 decoder. */
345 /* */
346 /* charstring_base :: The base address of the charstring stream. */
347 /* */
348 /* charstring_len :: The length in bytes of the charstring stream. */
349 /* */
350 /* <Return> */
351 /* FreeType error code. 0 means success. */
352 /* */
353 FT_LOCAL_DEF( FT_Error )
354 t1_decoder_parse_charstrings( T1_Decoder decoder,
355 FT_Byte* charstring_base,
356 FT_UInt charstring_len )
357 {
358 FT_Error error;
359 T1_Decoder_Zone zone;
360 FT_Byte* ip;
361 FT_Byte* limit;
362 T1_Builder builder = &decoder->builder;
363 FT_Pos x, y, orig_x, orig_y;
364 FT_Int known_othersubr_result_cnt = 0;
365 FT_Int unknown_othersubr_result_cnt = 0;
366 FT_Bool large_int;
367 FT_Fixed seed;
368
369 T1_Hints_Funcs hinter;
370
371 #ifdef FT_DEBUG_LEVEL_TRACE
372 FT_Bool bol = TRUE;
373 #endif
374
375
376 /* we don't want to touch the source code -- use macro trick */
377 #define start_point t1_builder_start_point
378 #define check_points t1_builder_check_points
379 #define add_point t1_builder_add_point
380 #define add_point1 t1_builder_add_point1
381 #define add_contour t1_builder_add_contour
382 #define close_contour t1_builder_close_contour
383
384
385 /* compute random seed from stack address of parameter */
386 seed = (FT_Fixed)( ( (FT_PtrDist)(char*)&seed ^
387 (FT_PtrDist)(char*)&decoder ^
388 (FT_PtrDist)(char*)&charstring_base ) &
389 FT_ULONG_MAX ) ;
390 seed = ( seed ^ ( seed >> 10 ) ^ ( seed >> 20 ) ) & 0xFFFFL;
391 if ( seed == 0 )
392 seed = 0x7384;
393
394 /* First of all, initialize the decoder */
395 decoder->top = decoder->stack;
396 decoder->zone = decoder->zones;
397 zone = decoder->zones;
398
399 builder->parse_state = T1_Parse_Start;
400
401 hinter = (T1_Hints_Funcs)builder->hints_funcs;
402
403 /* a font that reads BuildCharArray without setting */
404 /* its values first is buggy, but ... */
405 FT_ASSERT( ( decoder->len_buildchar == 0 ) ==
406 ( decoder->buildchar == NULL ) );
407
408 if ( decoder->len_buildchar > 0 )
409 ft_memset( &decoder->buildchar[0],
410 0,
411 sizeof( decoder->buildchar[0] ) * decoder->len_buildchar );
412
413 FT_TRACE4(( "\n"
414 "Start charstring\n" ));
415
416 zone->base = charstring_base;
417 limit = zone->limit = charstring_base + charstring_len;
418 ip = zone->cursor = zone->base;
419
420 error = PSaux_Err_Ok;
421
422 x = orig_x = builder->pos_x;
423 y = orig_y = builder->pos_y;
424
425 /* begin hints recording session, if any */
426 if ( hinter )
427 hinter->open( hinter->hints );
428
429 large_int = FALSE;
430
431 /* now, execute loop */
432 while ( ip < limit )
433 {
434 FT_Long* top = decoder->top;
435 T1_Operator op = op_none;
436 FT_Int32 value = 0;
437
438
439 FT_ASSERT( known_othersubr_result_cnt == 0 ||
440 unknown_othersubr_result_cnt == 0 );
441
442 #ifdef FT_DEBUG_LEVEL_TRACE
443 if ( bol )
444 {
445 FT_TRACE5(( " (%d)", decoder->top - decoder->stack ));
446 bol = FALSE;
447 }
448 #endif
449
450 /*********************************************************************/
451 /* */
452 /* Decode operator or operand */
453 /* */
454 /* */
455
456 /* first of all, decompress operator or value */
457 switch ( *ip++ )
458 {
459 case 1:
460 op = op_hstem;
461 break;
462
463 case 3:
464 op = op_vstem;
465 break;
466 case 4:
467 op = op_vmoveto;
468 break;
469 case 5:
470 op = op_rlineto;
471 break;
472 case 6:
473 op = op_hlineto;
474 break;
475 case 7:
476 op = op_vlineto;
477 break;
478 case 8:
479 op = op_rrcurveto;
480 break;
481 case 9:
482 op = op_closepath;
483 break;
484 case 10:
485 op = op_callsubr;
486 break;
487 case 11:
488 op = op_return;
489 break;
490
491 case 13:
492 op = op_hsbw;
493 break;
494 case 14:
495 op = op_endchar;
496 break;
497
498 case 15: /* undocumented, obsolete operator */
499 op = op_unknown15;
500 break;
501
502 case 21:
503 op = op_rmoveto;
504 break;
505 case 22:
506 op = op_hmoveto;
507 break;
508
509 case 30:
510 op = op_vhcurveto;
511 break;
512 case 31:
513 op = op_hvcurveto;
514 break;
515
516 case 12:
517 if ( ip > limit )
518 {
519 FT_ERROR(( "t1_decoder_parse_charstrings:"
520 " invalid escape (12+EOF)\n" ));
521 goto Syntax_Error;
522 }
523
524 switch ( *ip++ )
525 {
526 case 0:
527 op = op_dotsection;
528 break;
529 case 1:
530 op = op_vstem3;
531 break;
532 case 2:
533 op = op_hstem3;
534 break;
535 case 6:
536 op = op_seac;
537 break;
538 case 7:
539 op = op_sbw;
540 break;
541 case 12:
542 op = op_div;
543 break;
544 case 16:
545 op = op_callothersubr;
546 break;
547 case 17:
548 op = op_pop;
549 break;
550 case 33:
551 op = op_setcurrentpoint;
552 break;
553
554 default:
555 FT_ERROR(( "t1_decoder_parse_charstrings:"
556 " invalid escape (12+%d)\n",
557 ip[-1] ));
558 goto Syntax_Error;
559 }
560 break;
561
562 case 255: /* four bytes integer */
563 if ( ip + 4 > limit )
564 {
565 FT_ERROR(( "t1_decoder_parse_charstrings:"
566 " unexpected EOF in integer\n" ));
567 goto Syntax_Error;
568 }
569
570 value = (FT_Int32)( ( (FT_Long)ip[0] << 24 ) |
571 ( (FT_Long)ip[1] << 16 ) |
572 ( (FT_Long)ip[2] << 8 ) |
573 ip[3] );
574 ip += 4;
575
576 /* According to the specification, values > 32000 or < -32000 must */
577 /* be followed by a `div' operator to make the result be in the */
578 /* range [-32000;32000]. We expect that the second argument of */
579 /* `div' is not a large number. Additionally, we don't handle */
580 /* stuff like `<large1> <large2> <num> div <num> div' or */
581 /* <large1> <large2> <num> div div'. This is probably not allowed */
582 /* anyway. */
583 if ( value > 32000 || value < -32000 )
584 {
585 if ( large_int )
586 {
587 FT_ERROR(( "t1_decoder_parse_charstrings:"
588 " no `div' after large integer\n" ));
589 }
590 else
591 large_int = TRUE;
592 }
593 else
594 {
595 if ( !large_int )
596 value <<= 16;
597 }
598
599 break;
600
601 default:
602 if ( ip[-1] >= 32 )
603 {
604 if ( ip[-1] < 247 )
605 value = (FT_Int32)ip[-1] - 139;
606 else
607 {
608 if ( ++ip > limit )
609 {
610 FT_ERROR(( "t1_decoder_parse_charstrings:"
611 " unexpected EOF in integer\n" ));
612 goto Syntax_Error;
613 }
614
615 if ( ip[-2] < 251 )
616 value = ( ( (FT_Int32)ip[-2] - 247 ) << 8 ) + ip[-1] + 108;
617 else
618 value = -( ( ( (FT_Int32)ip[-2] - 251 ) << 8 ) + ip[-1] + 108 );
619 }
620
621 if ( !large_int )
622 value <<= 16;
623 }
624 else
625 {
626 FT_ERROR(( "t1_decoder_parse_charstrings:"
627 " invalid byte (%d)\n", ip[-1] ));
628 goto Syntax_Error;
629 }
630 }
631
632 if ( unknown_othersubr_result_cnt > 0 )
633 {
634 switch ( op )
635 {
636 case op_callsubr:
637 case op_return:
638 case op_none:
639 case op_pop:
640 break;
641
642 default:
643 /* all operands have been transferred by previous pops */
644 unknown_othersubr_result_cnt = 0;
645 break;
646 }
647 }
648
649 if ( large_int && !( op == op_none || op == op_div ) )
650 {
651 FT_ERROR(( "t1_decoder_parse_charstrings:"
652 " no `div' after large integer\n" ));
653
654 large_int = FALSE;
655 }
656
657 /*********************************************************************/
658 /* */
659 /* Push value on stack, or process operator */
660 /* */
661 /* */
662 if ( op == op_none )
663 {
664 if ( top - decoder->stack >= T1_MAX_CHARSTRINGS_OPERANDS )
665 {
666 FT_ERROR(( "t1_decoder_parse_charstrings: stack overflow\n" ));
667 goto Syntax_Error;
668 }
669
670 #ifdef FT_DEBUG_LEVEL_TRACE
671 if ( large_int )
672 FT_TRACE4(( " %ld", value ));
673 else
674 FT_TRACE4(( " %ld", (FT_Int32)( value >> 16 ) ));
675 #endif
676
677 *top++ = value;
678 decoder->top = top;
679 }
680 else if ( op == op_callothersubr ) /* callothersubr */
681 {
682 FT_Int subr_no;
683 FT_Int arg_cnt;
684
685
686 #ifdef FT_DEBUG_LEVEL_TRACE
687 FT_TRACE4(( " callothersubr\n" ));
688 bol = TRUE;
689 #endif
690
691 if ( top - decoder->stack < 2 )
692 goto Stack_Underflow;
693
694 top -= 2;
695
696 subr_no = (FT_Int)( top[1] >> 16 );
697 arg_cnt = (FT_Int)( top[0] >> 16 );
698
699 /***********************************************************/
700 /* */
701 /* remove all operands to callothersubr from the stack */
702 /* */
703 /* for handled othersubrs, where we know the number of */
704 /* arguments, we increase the stack by the value of */
705 /* known_othersubr_result_cnt */
706 /* */
707 /* for unhandled othersubrs the following pops adjust the */
708 /* stack pointer as necessary */
709
710 if ( arg_cnt > top - decoder->stack )
711 goto Stack_Underflow;
712
713 top -= arg_cnt;
714
715 known_othersubr_result_cnt = 0;
716 unknown_othersubr_result_cnt = 0;
717
718 /* XXX TODO: The checks to `arg_count == <whatever>' */
719 /* might not be correct; an othersubr expects a certain */
720 /* number of operands on the PostScript stack (as opposed */
721 /* to the T1 stack) but it doesn't have to put them there */
722 /* by itself; previous othersubrs might have left the */
723 /* operands there if they were not followed by an */
724 /* appropriate number of pops */
725 /* */
726 /* On the other hand, Adobe Reader 7.0.8 for Linux doesn't */
727 /* accept a font that contains charstrings like */
728 /* */
729 /* 100 200 2 20 callothersubr */
730 /* 300 1 20 callothersubr pop */
731 /* */
732 /* Perhaps this is the reason why BuildCharArray exists. */
733
734 switch ( subr_no )
735 {
736 case 1: /* start flex feature */
737 if ( arg_cnt != 0 )
738 goto Unexpected_OtherSubr;
739
740 decoder->flex_state = 1;
741 decoder->num_flex_vectors = 0;
742 if ( start_point( builder, x, y ) ||
743 check_points( builder, 6 ) )
744 goto Fail;
745 break;
746
747 case 2: /* add flex vectors */
748 {
749 FT_Int idx;
750
751
752 if ( arg_cnt != 0 )
753 goto Unexpected_OtherSubr;
754
755 /* note that we should not add a point for index 0; */
756 /* this will move our current position to the flex */
757 /* point without adding any point to the outline */
758 idx = decoder->num_flex_vectors++;
759 if ( idx > 0 && idx < 7 )
760 add_point( builder,
761 x,
762 y,
763 (FT_Byte)( idx == 3 || idx == 6 ) );
764 }
765 break;
766
767 case 0: /* end flex feature */
768 if ( arg_cnt != 3 )
769 goto Unexpected_OtherSubr;
770
771 if ( decoder->flex_state == 0 ||
772 decoder->num_flex_vectors != 7 )
773 {
774 FT_ERROR(( "t1_decoder_parse_charstrings:"
775 " unexpected flex end\n" ));
776 goto Syntax_Error;
777 }
778
779 /* the two `results' are popped by the following setcurrentpoint */
780 known_othersubr_result_cnt = 2;
781 break;
782
783 case 3: /* change hints */
784 if ( arg_cnt != 1 )
785 goto Unexpected_OtherSubr;
786
787 known_othersubr_result_cnt = 1;
788
789 if ( hinter )
790 hinter->reset( hinter->hints, builder->current->n_points );
791 break;
792
793 case 12:
794 case 13:
795 /* counter control hints, clear stack */
796 top = decoder->stack;
797 break;
798
799 case 14:
800 case 15:
801 case 16:
802 case 17:
803 case 18: /* multiple masters */
804 {
805 PS_Blend blend = decoder->blend;
806 FT_UInt num_points, nn, mm;
807 FT_Long* delta;
808 FT_Long* values;
809
810
811 if ( !blend )
812 {
813 FT_ERROR(( "t1_decoder_parse_charstrings:"
814 " unexpected multiple masters operator\n" ));
815 goto Syntax_Error;
816 }
817
818 num_points = (FT_UInt)subr_no - 13 + ( subr_no == 18 );
819 if ( arg_cnt != (FT_Int)( num_points * blend->num_designs ) )
820 {
821 FT_ERROR(( "t1_decoder_parse_charstrings:"
822 " incorrect number of multiple masters arguments\n" ));
823 goto Syntax_Error;
824 }
825
826 /* we want to compute: */
827 /* */
828 /* a0*w0 + a1*w1 + ... + ak*wk */
829 /* */
830 /* but we only have the a0, a1-a0, a2-a0, .. ak-a0 */
831 /* however, given that w0 + w1 + ... + wk == 1, we can */
832 /* rewrite it easily as: */
833 /* */
834 /* a0 + (a1-a0)*w1 + (a2-a0)*w2 + .. + (ak-a0)*wk */
835 /* */
836 /* where k == num_designs-1 */
837 /* */
838 /* I guess that's why it's written in this `compact' */
839 /* form. */
840 /* */
841 delta = top + num_points;
842 values = top;
843 for ( nn = 0; nn < num_points; nn++ )
844 {
845 FT_Long tmp = values[0];
846
847
848 for ( mm = 1; mm < blend->num_designs; mm++ )
849 tmp += FT_MulFix( *delta++, blend->weight_vector[mm] );
850
851 *values++ = tmp;
852 }
853
854 known_othersubr_result_cnt = num_points;
855 break;
856 }
857
858 case 19:
859 /* <idx> 1 19 callothersubr */
860 /* => replace elements starting from index cvi( <idx> ) */
861 /* of BuildCharArray with WeightVector */
862 {
863 FT_Int idx;
864 PS_Blend blend = decoder->blend;
865
866
867 if ( arg_cnt != 1 || blend == NULL )
868 goto Unexpected_OtherSubr;
869
870 idx = (FT_Int)( top[0] >> 16 );
871
872 if ( idx < 0 ||
873 idx + blend->num_designs > decoder->len_buildchar )
874 goto Unexpected_OtherSubr;
875
876 ft_memcpy( &decoder->buildchar[idx],
877 blend->weight_vector,
878 blend->num_designs *
879 sizeof( blend->weight_vector[0] ) );
880 }
881 break;
882
883 case 20:
884 /* <arg1> <arg2> 2 20 callothersubr pop */
885 /* ==> push <arg1> + <arg2> onto T1 stack */
886 if ( arg_cnt != 2 )
887 goto Unexpected_OtherSubr;
888
889 top[0] += top[1]; /* XXX (over|under)flow */
890
891 known_othersubr_result_cnt = 1;
892 break;
893
894 case 21:
895 /* <arg1> <arg2> 2 21 callothersubr pop */
896 /* ==> push <arg1> - <arg2> onto T1 stack */
897 if ( arg_cnt != 2 )
898 goto Unexpected_OtherSubr;
899
900 top[0] -= top[1]; /* XXX (over|under)flow */
901
902 known_othersubr_result_cnt = 1;
903 break;
904
905 case 22:
906 /* <arg1> <arg2> 2 22 callothersubr pop */
907 /* ==> push <arg1> * <arg2> onto T1 stack */
908 if ( arg_cnt != 2 )
909 goto Unexpected_OtherSubr;
910
911 top[0] = FT_MulFix( top[0], top[1] );
912
913 known_othersubr_result_cnt = 1;
914 break;
915
916 case 23:
917 /* <arg1> <arg2> 2 23 callothersubr pop */
918 /* ==> push <arg1> / <arg2> onto T1 stack */
919 if ( arg_cnt != 2 || top[1] == 0 )
920 goto Unexpected_OtherSubr;
921
922 top[0] = FT_DivFix( top[0], top[1] );
923
924 known_othersubr_result_cnt = 1;
925 break;
926
927 case 24:
928 /* <val> <idx> 2 24 callothersubr */
929 /* ==> set BuildCharArray[cvi( <idx> )] = <val> */
930 {
931 FT_Int idx;
932 PS_Blend blend = decoder->blend;
933
934
935 if ( arg_cnt != 2 || blend == NULL )
936 goto Unexpected_OtherSubr;
937
938 idx = (FT_Int)( top[1] >> 16 );
939
940 if ( idx < 0 || (FT_UInt) idx >= decoder->len_buildchar )
941 goto Unexpected_OtherSubr;
942
943 decoder->buildchar[idx] = top[0];
944 }
945 break;
946
947 case 25:
948 /* <idx> 1 25 callothersubr pop */
949 /* ==> push BuildCharArray[cvi( idx )] */
950 /* onto T1 stack */
951 {
952 FT_Int idx;
953 PS_Blend blend = decoder->blend;
954
955
956 if ( arg_cnt != 1 || blend == NULL )
957 goto Unexpected_OtherSubr;
958
959 idx = (FT_Int)( top[0] >> 16 );
960
961 if ( idx < 0 || (FT_UInt) idx >= decoder->len_buildchar )
962 goto Unexpected_OtherSubr;
963
964 top[0] = decoder->buildchar[idx];
965 }
966
967 known_othersubr_result_cnt = 1;
968 break;
969
970 #if 0
971 case 26:
972 /* <val> mark <idx> ==> set BuildCharArray[cvi( <idx> )] = <val>, */
973 /* leave mark on T1 stack */
974 /* <val> <idx> ==> set BuildCharArray[cvi( <idx> )] = <val> */
975 XXX which routine has left its mark on the (PostScript) stack?;
976 break;
977 #endif
978
979 case 27:
980 /* <res1> <res2> <val1> <val2> 4 27 callothersubr pop */
981 /* ==> push <res1> onto T1 stack if <val1> <= <val2>, */
982 /* otherwise push <res2> */
983 if ( arg_cnt != 4 )
984 goto Unexpected_OtherSubr;
985
986 if ( top[2] > top[3] )
987 top[0] = top[1];
988
989 known_othersubr_result_cnt = 1;
990 break;
991
992 case 28:
993 /* 0 28 callothersubr pop */
994 /* => push random value from interval [0, 1) onto stack */
995 if ( arg_cnt != 0 )
996 goto Unexpected_OtherSubr;
997
998 {
999 FT_Fixed Rand;
1000
1001
1002 Rand = seed;
1003 if ( Rand >= 0x8000L )
1004 Rand++;
1005
1006 top[0] = Rand;
1007
1008 seed = FT_MulFix( seed, 0x10000L - seed );
1009 if ( seed == 0 )
1010 seed += 0x2873;
1011 }
1012
1013 known_othersubr_result_cnt = 1;
1014 break;
1015
1016 default:
1017 FT_ERROR(( "t1_decoder_parse_charstrings:"
1018 " unknown othersubr [%d %d], wish me luck\n",
1019 arg_cnt, subr_no ));
1020 unknown_othersubr_result_cnt = arg_cnt;
1021 break;
1022
1023 Unexpected_OtherSubr:
1024 FT_ERROR(( "t1_decoder_parse_charstrings:"
1025 " invalid othersubr [%d %d]\n", arg_cnt, subr_no ));
1026 goto Syntax_Error;
1027 }
1028
1029 top += known_othersubr_result_cnt;
1030
1031 decoder->top = top;
1032 }
1033 else /* general operator */
1034 {
1035 FT_Int num_args = t1_args_count[op];
1036
1037
1038 FT_ASSERT( num_args >= 0 );
1039
1040 if ( top - decoder->stack < num_args )
1041 goto Stack_Underflow;
1042
1043 /* XXX Operators usually take their operands from the */
1044 /* bottom of the stack, i.e., the operands are */
1045 /* decoder->stack[0], ..., decoder->stack[num_args - 1]; */
1046 /* only div, callsubr, and callothersubr are different. */
1047 /* In practice it doesn't matter (?). */
1048
1049 #ifdef FT_DEBUG_LEVEL_TRACE
1050
1051 switch ( op )
1052 {
1053 case op_callsubr:
1054 case op_div:
1055 case op_callothersubr:
1056 case op_pop:
1057 case op_return:
1058 break;
1059
1060 default:
1061 if ( top - decoder->stack != num_args )
1062 FT_TRACE0(( "t1_decoder_parse_charstrings:"
1063 " too much operands on the stack"
1064 " (seen %d, expected %d)\n",
1065 top - decoder->stack, num_args ));
1066 break;
1067 }
1068
1069 #endif /* FT_DEBUG_LEVEL_TRACE */
1070
1071 top -= num_args;
1072
1073 switch ( op )
1074 {
1075 case op_endchar:
1076 FT_TRACE4(( " endchar\n" ));
1077
1078 close_contour( builder );
1079
1080 /* close hints recording session */
1081 if ( hinter )
1082 {
1083 if ( hinter->close( hinter->hints, builder->current->n_points ) )
1084 goto Syntax_Error;
1085
1086 /* apply hints to the loaded glyph outline now */
1087 hinter->apply( hinter->hints,
1088 builder->current,
1089 (PSH_Globals)builder->hints_globals,
1090 decoder->hint_mode );
1091 }
1092
1093 /* add current outline to the glyph slot */
1094 FT_GlyphLoader_Add( builder->loader );
1095
1096 /* the compiler should optimize away this empty loop but ... */
1097
1098 #ifdef FT_DEBUG_LEVEL_TRACE
1099
1100 if ( decoder->len_buildchar > 0 )
1101 {
1102 FT_UInt i;
1103
1104
1105 FT_TRACE4(( "BuildCharArray = [ " ));
1106
1107 for ( i = 0; i < decoder->len_buildchar; ++i )
1108 FT_TRACE4(( "%d ", decoder->buildchar[ i ] ));
1109
1110 FT_TRACE4(( "]\n" ));
1111 }
1112
1113 #endif /* FT_DEBUG_LEVEL_TRACE */
1114
1115 FT_TRACE4(( "\n" ));
1116
1117 /* return now! */
1118 return PSaux_Err_Ok;
1119
1120 case op_hsbw:
1121 FT_TRACE4(( " hsbw" ));
1122
1123 builder->parse_state = T1_Parse_Have_Width;
1124
1125 builder->left_bearing.x += top[0];
1126 builder->advance.x = top[1];
1127 builder->advance.y = 0;
1128
1129 orig_x = x = builder->pos_x + top[0];
1130 orig_y = y = builder->pos_y;
1131
1132 FT_UNUSED( orig_y );
1133
1134 /* the `metrics_only' indicates that we only want to compute */
1135 /* the glyph's metrics (lsb + advance width), not load the */
1136 /* rest of it; so exit immediately */
1137 if ( builder->metrics_only )
1138 return PSaux_Err_Ok;
1139
1140 break;
1141
1142 case op_seac:
1143 return t1operator_seac( decoder,
1144 top[0],
1145 top[1],
1146 top[2],
1147 (FT_Int)( top[3] >> 16 ),
1148 (FT_Int)( top[4] >> 16 ) );
1149
1150 case op_sbw:
1151 FT_TRACE4(( " sbw" ));
1152
1153 builder->parse_state = T1_Parse_Have_Width;
1154
1155 builder->left_bearing.x += top[0];
1156 builder->left_bearing.y += top[1];
1157 builder->advance.x = top[2];
1158 builder->advance.y = top[3];
1159
1160 x = builder->pos_x + top[0];
1161 y = builder->pos_y + top[1];
1162
1163 /* the `metrics_only' indicates that we only want to compute */
1164 /* the glyph's metrics (lsb + advance width), not load the */
1165 /* rest of it; so exit immediately */
1166 if ( builder->metrics_only )
1167 return PSaux_Err_Ok;
1168
1169 break;
1170
1171 case op_closepath:
1172 FT_TRACE4(( " closepath" ));
1173
1174 /* if there is no path, `closepath' is a no-op */
1175 if ( builder->parse_state == T1_Parse_Have_Path ||
1176 builder->parse_state == T1_Parse_Have_Moveto )
1177 close_contour( builder );
1178
1179 builder->parse_state = T1_Parse_Have_Width;
1180 break;
1181
1182 case op_hlineto:
1183 FT_TRACE4(( " hlineto" ));
1184
1185 if ( start_point( builder, x, y ) )
1186 goto Fail;
1187
1188 x += top[0];
1189 goto Add_Line;
1190
1191 case op_hmoveto:
1192 FT_TRACE4(( " hmoveto" ));
1193
1194 x += top[0];
1195 if ( !decoder->flex_state )
1196 {
1197 if ( builder->parse_state == T1_Parse_Start )
1198 goto Syntax_Error;
1199 builder->parse_state = T1_Parse_Have_Moveto;
1200 }
1201 break;
1202
1203 case op_hvcurveto:
1204 FT_TRACE4(( " hvcurveto" ));
1205
1206 if ( start_point( builder, x, y ) ||
1207 check_points( builder, 3 ) )
1208 goto Fail;
1209
1210 x += top[0];
1211 add_point( builder, x, y, 0 );
1212 x += top[1];
1213 y += top[2];
1214 add_point( builder, x, y, 0 );
1215 y += top[3];
1216 add_point( builder, x, y, 1 );
1217 break;
1218
1219 case op_rlineto:
1220 FT_TRACE4(( " rlineto" ));
1221
1222 if ( start_point( builder, x, y ) )
1223 goto Fail;
1224
1225 x += top[0];
1226 y += top[1];
1227
1228 Add_Line:
1229 if ( add_point1( builder, x, y ) )
1230 goto Fail;
1231 break;
1232
1233 case op_rmoveto:
1234 FT_TRACE4(( " rmoveto" ));
1235
1236 x += top[0];
1237 y += top[1];
1238 if ( !decoder->flex_state )
1239 {
1240 if ( builder->parse_state == T1_Parse_Start )
1241 goto Syntax_Error;
1242 builder->parse_state = T1_Parse_Have_Moveto;
1243 }
1244 break;
1245
1246 case op_rrcurveto:
1247 FT_TRACE4(( " rrcurveto" ));
1248
1249 if ( start_point( builder, x, y ) ||
1250 check_points( builder, 3 ) )
1251 goto Fail;
1252
1253 x += top[0];
1254 y += top[1];
1255 add_point( builder, x, y, 0 );
1256
1257 x += top[2];
1258 y += top[3];
1259 add_point( builder, x, y, 0 );
1260
1261 x += top[4];
1262 y += top[5];
1263 add_point( builder, x, y, 1 );
1264 break;
1265
1266 case op_vhcurveto:
1267 FT_TRACE4(( " vhcurveto" ));
1268
1269 if ( start_point( builder, x, y ) ||
1270 check_points( builder, 3 ) )
1271 goto Fail;
1272
1273 y += top[0];
1274 add_point( builder, x, y, 0 );
1275 x += top[1];
1276 y += top[2];
1277 add_point( builder, x, y, 0 );
1278 x += top[3];
1279 add_point( builder, x, y, 1 );
1280 break;
1281
1282 case op_vlineto:
1283 FT_TRACE4(( " vlineto" ));
1284
1285 if ( start_point( builder, x, y ) )
1286 goto Fail;
1287
1288 y += top[0];
1289 goto Add_Line;
1290
1291 case op_vmoveto:
1292 FT_TRACE4(( " vmoveto" ));
1293
1294 y += top[0];
1295 if ( !decoder->flex_state )
1296 {
1297 if ( builder->parse_state == T1_Parse_Start )
1298 goto Syntax_Error;
1299 builder->parse_state = T1_Parse_Have_Moveto;
1300 }
1301 break;
1302
1303 case op_div:
1304 FT_TRACE4(( " div" ));
1305
1306 /* if `large_int' is set, we divide unscaled numbers; */
1307 /* otherwise, we divide numbers in 16.16 format -- */
1308 /* in both cases, it is the same operation */
1309 *top = FT_DivFix( top[0], top[1] );
1310 ++top;
1311
1312 large_int = FALSE;
1313 break;
1314
1315 case op_callsubr:
1316 {
1317 FT_Int idx;
1318
1319
1320 FT_TRACE4(( " callsubr" ));
1321
1322 idx = (FT_Int)( top[0] >> 16 );
1323 if ( idx < 0 || idx >= (FT_Int)decoder->num_subrs )
1324 {
1325 FT_ERROR(( "t1_decoder_parse_charstrings:"
1326 " invalid subrs index\n" ));
1327 goto Syntax_Error;
1328 }
1329
1330 if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS )
1331 {
1332 FT_ERROR(( "t1_decoder_parse_charstrings:"
1333 " too many nested subrs\n" ));
1334 goto Syntax_Error;
1335 }
1336
1337 zone->cursor = ip; /* save current instruction pointer */
1338
1339 zone++;
1340
1341 /* The Type 1 driver stores subroutines without the seed bytes. */
1342 /* The CID driver stores subroutines with seed bytes. This */
1343 /* case is taken care of when decoder->subrs_len == 0. */
1344 zone->base = decoder->subrs[idx];
1345
1346 if ( decoder->subrs_len )
1347 zone->limit = zone->base + decoder->subrs_len[idx];
1348 else
1349 {
1350 /* We are using subroutines from a CID font. We must adjust */
1351 /* for the seed bytes. */
1352 zone->base += ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
1353 zone->limit = decoder->subrs[idx + 1];
1354 }
1355
1356 zone->cursor = zone->base;
1357
1358 if ( !zone->base )
1359 {
1360 FT_ERROR(( "t1_decoder_parse_charstrings:"
1361 " invoking empty subrs\n" ));
1362 goto Syntax_Error;
1363 }
1364
1365 decoder->zone = zone;
1366 ip = zone->base;
1367 limit = zone->limit;
1368 break;
1369 }
1370
1371 case op_pop:
1372 FT_TRACE4(( " pop" ));
1373
1374 if ( known_othersubr_result_cnt > 0 )
1375 {
1376 known_othersubr_result_cnt--;
1377 /* ignore, we pushed the operands ourselves */
1378 break;
1379 }
1380
1381 if ( unknown_othersubr_result_cnt == 0 )
1382 {
1383 FT_ERROR(( "t1_decoder_parse_charstrings:"
1384 " no more operands for othersubr\n" ));
1385 goto Syntax_Error;
1386 }
1387
1388 unknown_othersubr_result_cnt--;
1389 top++; /* `push' the operand to callothersubr onto the stack */
1390 break;
1391
1392 case op_return:
1393 FT_TRACE4(( " return" ));
1394
1395 if ( zone <= decoder->zones )
1396 {
1397 FT_ERROR(( "t1_decoder_parse_charstrings:"
1398 " unexpected return\n" ));
1399 goto Syntax_Error;
1400 }
1401
1402 zone--;
1403 ip = zone->cursor;
1404 limit = zone->limit;
1405 decoder->zone = zone;
1406 break;
1407
1408 case op_dotsection:
1409 FT_TRACE4(( " dotsection" ));
1410
1411 break;
1412
1413 case op_hstem:
1414 FT_TRACE4(( " hstem" ));
1415
1416 /* record horizontal hint */
1417 if ( hinter )
1418 {
1419 /* top[0] += builder->left_bearing.y; */
1420 hinter->stem( hinter->hints, 1, top );
1421 }
1422 break;
1423
1424 case op_hstem3:
1425 FT_TRACE4(( " hstem3" ));
1426
1427 /* record horizontal counter-controlled hints */
1428 if ( hinter )
1429 hinter->stem3( hinter->hints, 1, top );
1430 break;
1431
1432 case op_vstem:
1433 FT_TRACE4(( " vstem" ));
1434
1435 /* record vertical hint */
1436 if ( hinter )
1437 {
1438 top[0] += orig_x;
1439 hinter->stem( hinter->hints, 0, top );
1440 }
1441 break;
1442
1443 case op_vstem3:
1444 FT_TRACE4(( " vstem3" ));
1445
1446 /* record vertical counter-controlled hints */
1447 if ( hinter )
1448 {
1449 FT_Pos dx = orig_x;
1450
1451
1452 top[0] += dx;
1453 top[2] += dx;
1454 top[4] += dx;
1455 hinter->stem3( hinter->hints, 0, top );
1456 }
1457 break;
1458
1459 case op_setcurrentpoint:
1460 FT_TRACE4(( " setcurrentpoint" ));
1461
1462 /* From the T1 specification, section 6.4: */
1463 /* */
1464 /* The setcurrentpoint command is used only in */
1465 /* conjunction with results from OtherSubrs procedures. */
1466
1467 /* known_othersubr_result_cnt != 0 is already handled */
1468 /* above. */
1469
1470 /* Note, however, that both Ghostscript and Adobe */
1471 /* Distiller handle this situation by silently ignoring */
1472 /* the inappropriate `setcurrentpoint' instruction. So */
1473 /* we do the same. */
1474 #if 0
1475
1476 if ( decoder->flex_state != 1 )
1477 {
1478 FT_ERROR(( "t1_decoder_parse_charstrings:"
1479 " unexpected `setcurrentpoint'\n" ));
1480 goto Syntax_Error;
1481 }
1482 else
1483 #endif
1484 decoder->flex_state = 0;
1485 break;
1486
1487 case op_unknown15:
1488 FT_TRACE4(( " opcode_15" ));
1489 /* nothing to do except to pop the two arguments */
1490 break;
1491
1492 default:
1493 FT_ERROR(( "t1_decoder_parse_charstrings:"
1494 " unhandled opcode %d\n", op ));
1495 goto Syntax_Error;
1496 }
1497
1498 /* XXX Operators usually clear the operand stack; */
1499 /* only div, callsubr, callothersubr, pop, and */
1500 /* return are different. */
1501 /* In practice it doesn't matter (?). */
1502
1503 decoder->top = top;
1504
1505 #ifdef FT_DEBUG_LEVEL_TRACE
1506 FT_TRACE4(( "\n" ));
1507 bol = TRUE;
1508 #endif
1509
1510 } /* general operator processing */
1511
1512 } /* while ip < limit */
1513
1514 FT_TRACE4(( "..end..\n\n" ));
1515
1516 Fail:
1517 return error;
1518
1519 Syntax_Error:
1520 return PSaux_Err_Syntax_Error;
1521
1522 Stack_Underflow:
1523 return PSaux_Err_Stack_Underflow;
1524 }
1525
1526
1527 /* parse a single Type 1 glyph */
1528 FT_LOCAL_DEF( FT_Error )
1529 t1_decoder_parse_glyph( T1_Decoder decoder,
1530 FT_UInt glyph )
1531 {
1532 return decoder->parse_callback( decoder, glyph );
1533 }
1534
1535
1536 /* initialize T1 decoder */
1537 FT_LOCAL_DEF( FT_Error )
1538 t1_decoder_init( T1_Decoder decoder,
1539 FT_Face face,
1540 FT_Size size,
1541 FT_GlyphSlot slot,
1542 FT_Byte** glyph_names,
1543 PS_Blend blend,
1544 FT_Bool hinting,
1545 FT_Render_Mode hint_mode,
1546 T1_Decoder_Callback parse_callback )
1547 {
1548 FT_MEM_ZERO( decoder, sizeof ( *decoder ) );
1549
1550 /* retrieve PSNames interface from list of current modules */
1551 {
1552 FT_Service_PsCMaps psnames = 0;
1553
1554
1555 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
1556 if ( !psnames )
1557 {
1558 FT_ERROR(( "t1_decoder_init:"
1559 " the `psnames' module is not available\n" ));
1560 return PSaux_Err_Unimplemented_Feature;
1561 }
1562
1563 decoder->psnames = psnames;
1564 }
1565
1566 t1_builder_init( &decoder->builder, face, size, slot, hinting );
1567
1568 /* decoder->buildchar and decoder->len_buildchar have to be */
1569 /* initialized by the caller since we cannot know the length */
1570 /* of the BuildCharArray */
1571
1572 decoder->num_glyphs = (FT_UInt)face->num_glyphs;
1573 decoder->glyph_names = glyph_names;
1574 decoder->hint_mode = hint_mode;
1575 decoder->blend = blend;
1576 decoder->parse_callback = parse_callback;
1577
1578 decoder->funcs = t1_decoder_funcs;
1579
1580 return PSaux_Err_Ok;
1581 }
1582
1583
1584 /* finalize T1 decoder */
1585 FT_LOCAL_DEF( void )
1586 t1_decoder_done( T1_Decoder decoder )
1587 {
1588 t1_builder_done( &decoder->builder );
1589 }
1590
1591
1592 /* END */
Open USB/SMB/HDD Game Loader for PS2/PS3