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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 / truetype / ttgload.c
blob57ea0baa770cef88d6881034750460bbe1605491
1 /***************************************************************************/
2 /* */
3 /* ttgload.c */
4 /* */
5 /* TrueType Glyph Loader (body). */
6 /* */
7 /* Copyright 1996-2001, 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_DEBUG_H
22 #include FT_INTERNAL_CALC_H
23 #include FT_INTERNAL_STREAM_H
24 #include FT_INTERNAL_SFNT_H
25 #include FT_TRUETYPE_TAGS_H
26 #include FT_OUTLINE_H
27
28 #include "ttgload.h"
29 #include "ttpload.h"
30
31 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
32 #include "ttgxvar.h"
33 #endif
34
35 #include "tterrors.h"
36
37
38 /*************************************************************************/
39 /* */
40 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
41 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
42 /* messages during execution. */
43 /* */
44 #undef FT_COMPONENT
45 #define FT_COMPONENT trace_ttgload
46
47
48 /*************************************************************************/
49 /* */
50 /* Composite font flags. */
51 /* */
52 #define ARGS_ARE_WORDS 0x0001
53 #define ARGS_ARE_XY_VALUES 0x0002
54 #define ROUND_XY_TO_GRID 0x0004
55 #define WE_HAVE_A_SCALE 0x0008
56 /* reserved 0x0010 */
57 #define MORE_COMPONENTS 0x0020
58 #define WE_HAVE_AN_XY_SCALE 0x0040
59 #define WE_HAVE_A_2X2 0x0080
60 #define WE_HAVE_INSTR 0x0100
61 #define USE_MY_METRICS 0x0200
62 #define OVERLAP_COMPOUND 0x0400
63 #define SCALED_COMPONENT_OFFSET 0x0800
64 #define UNSCALED_COMPONENT_OFFSET 0x1000
65
66
67 /*************************************************************************/
68 /* */
69 /* Returns the horizontal metrics in font units for a given glyph. If */
70 /* `check' is true, take care of monospaced fonts by returning the */
71 /* advance width maximum. */
72 /* */
73 FT_LOCAL_DEF( void )
74 TT_Get_HMetrics( TT_Face face,
75 FT_UInt idx,
76 FT_Bool check,
77 FT_Short* lsb,
78 FT_UShort* aw )
79 {
80 ( (SFNT_Service)face->sfnt )->get_metrics( face, 0, idx, lsb, aw );
81
82 if ( check && face->postscript.isFixedPitch )
83 *aw = face->horizontal.advance_Width_Max;
84
85 FT_TRACE5(( " advance width (font units): %d\n", *aw ));
86 FT_TRACE5(( " left side bearing (font units): %d\n", *lsb ));
87 }
88
89
90 /*************************************************************************/
91 /* */
92 /* Returns the vertical metrics in font units for a given glyph. */
93 /* Greg Hitchcock from Microsoft told us that if there were no `vmtx' */
94 /* table, typoAscender/Descender from the `OS/2' table would be used */
95 /* instead, and if there were no `OS/2' table, use ascender/descender */
96 /* from the `hhea' table. But that is not what Microsoft's rasterizer */
97 /* apparently does: It uses the ppem value as the advance height, and */
98 /* sets the top side bearing to be zero. */
99 /* */
100 /* The monospace `check' is probably not meaningful here, but we leave */
101 /* it in for a consistent interface. */
102 /* */
103 FT_LOCAL_DEF( void )
104 TT_Get_VMetrics( TT_Face face,
105 FT_UInt idx,
106 FT_Bool check,
107 FT_Short* tsb,
108 FT_UShort* ah )
109 {
110 FT_UNUSED( check );
111
112 if ( face->vertical_info )
113 ( (SFNT_Service)face->sfnt )->get_metrics( face, 1, idx, tsb, ah );
114
115 #if 1 /* Empirically determined, at variance with what MS said */
116
117 else
118 {
119 *tsb = 0;
120 *ah = face->root.units_per_EM;
121 }
122
123 #else /* This is what MS said to do. It isn't what they do, however. */
124
125 else if ( face->os2.version != 0xFFFFU )
126 {
127 *tsb = face->os2.sTypoAscender;
128 *ah = face->os2.sTypoAscender - face->os2.sTypoDescender;
129 }
130 else
131 {
132 *tsb = face->horizontal.Ascender;
133 *ah = face->horizontal.Ascender - face->horizontal.Descender;
134 }
135
136 #endif
137
138 FT_TRACE5(( " advance height (font units): %d\n", *ah ));
139 FT_TRACE5(( " top side bearing (font units): %d\n", *tsb ));
140 }
141
142
143 static void
144 tt_get_metrics( TT_Loader loader,
145 FT_UInt glyph_index )
146 {
147 TT_Face face = (TT_Face)loader->face;
148
149 FT_Short left_bearing = 0, top_bearing = 0;
150 FT_UShort advance_width = 0, advance_height = 0;
151
152
153 TT_Get_HMetrics( face, glyph_index,
154 (FT_Bool)!( loader->load_flags &
155 FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
156 &left_bearing,
157 &advance_width );
158 TT_Get_VMetrics( face, glyph_index,
159 (FT_Bool)!( loader->load_flags &
160 FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
161 &top_bearing,
162 &advance_height );
163
164 #ifdef FT_CONFIG_OPTION_INCREMENTAL
165
166 /* If this is an incrementally loaded font check whether there are */
167 /* overriding metrics for this glyph. */
168 if ( face->root.internal->incremental_interface &&
169 face->root.internal->incremental_interface->funcs->get_glyph_metrics )
170 {
171 FT_Incremental_MetricsRec metrics;
172 FT_Error error;
173
174
175 metrics.bearing_x = left_bearing;
176 metrics.bearing_y = 0;
177 metrics.advance = advance_width;
178 metrics.advance_v = 0;
179
180 error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
181 face->root.internal->incremental_interface->object,
182 glyph_index, FALSE, &metrics );
183 if ( error )
184 goto Exit;
185
186 left_bearing = (FT_Short)metrics.bearing_x;
187 advance_width = (FT_UShort)metrics.advance;
188
189 #if 0
190
191 /* GWW: Do I do the same for vertical metrics? */
192 metrics.bearing_x = 0;
193 metrics.bearing_y = top_bearing;
194 metrics.advance = advance_height;
195
196 error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
197 face->root.internal->incremental_interface->object,
198 glyph_index, TRUE, &metrics );
199 if ( error )
200 goto Exit;
201
202 top_bearing = (FT_Short)metrics.bearing_y;
203 advance_height = (FT_UShort)metrics.advance;
204
205 #endif /* 0 */
206
207 }
208
209 Exit:
210
211 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
212
213 loader->left_bearing = left_bearing;
214 loader->advance = advance_width;
215 loader->top_bearing = top_bearing;
216 loader->vadvance = advance_height;
217
218 if ( !loader->linear_def )
219 {
220 loader->linear_def = 1;
221 loader->linear = advance_width;
222 }
223 }
224
225
226 /*************************************************************************/
227 /* */
228 /* Translates an array of coordinates. */
229 /* */
230 static void
231 translate_array( FT_UInt n,
232 FT_Vector* coords,
233 FT_Pos delta_x,
234 FT_Pos delta_y )
235 {
236 FT_UInt k;
237
238
239 if ( delta_x )
240 for ( k = 0; k < n; k++ )
241 coords[k].x += delta_x;
242
243 if ( delta_y )
244 for ( k = 0; k < n; k++ )
245 coords[k].y += delta_y;
246 }
247
248
249 #undef IS_HINTED
250 #define IS_HINTED( flags ) ( ( flags & FT_LOAD_NO_HINTING ) == 0 )
251
252
253 /*************************************************************************/
254 /* */
255 /* The following functions are used by default with TrueType fonts. */
256 /* However, they can be replaced by alternatives if we need to support */
257 /* TrueType-compressed formats (like MicroType) in the future. */
258 /* */
259 /*************************************************************************/
260
261 FT_CALLBACK_DEF( FT_Error )
262 TT_Access_Glyph_Frame( TT_Loader loader,
263 FT_UInt glyph_index,
264 FT_ULong offset,
265 FT_UInt byte_count )
266 {
267 FT_Error error;
268 FT_Stream stream = loader->stream;
269
270 /* for non-debug mode */
271 FT_UNUSED( glyph_index );
272
273
274 FT_TRACE5(( "Glyph %ld\n", glyph_index ));
275
276 /* the following line sets the `error' variable through macros! */
277 if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )
278 return error;
279
280 loader->cursor = stream->cursor;
281 loader->limit = stream->limit;
282
283 return TT_Err_Ok;
284 }
285
286
287 FT_CALLBACK_DEF( void )
288 TT_Forget_Glyph_Frame( TT_Loader loader )
289 {
290 FT_Stream stream = loader->stream;
291
292
293 FT_FRAME_EXIT();
294 }
295
296
297 FT_CALLBACK_DEF( FT_Error )
298 TT_Load_Glyph_Header( TT_Loader loader )
299 {
300 FT_Byte* p = loader->cursor;
301 FT_Byte* limit = loader->limit;
302
303
304 if ( p + 10 > limit )
305 return TT_Err_Invalid_Outline;
306
307 loader->n_contours = FT_NEXT_SHORT( p );
308
309 loader->bbox.xMin = FT_NEXT_SHORT( p );
310 loader->bbox.yMin = FT_NEXT_SHORT( p );
311 loader->bbox.xMax = FT_NEXT_SHORT( p );
312 loader->bbox.yMax = FT_NEXT_SHORT( p );
313
314 FT_TRACE5(( " # of contours: %d\n", loader->n_contours ));
315 FT_TRACE5(( " xMin: %4d xMax: %4d\n", loader->bbox.xMin,
316 loader->bbox.xMax ));
317 FT_TRACE5(( " yMin: %4d yMax: %4d\n", loader->bbox.yMin,
318 loader->bbox.yMax ));
319 loader->cursor = p;
320
321 return TT_Err_Ok;
322 }
323
324
325 FT_CALLBACK_DEF( FT_Error )
326 TT_Load_Simple_Glyph( TT_Loader load )
327 {
328 FT_Error error;
329 FT_Byte* p = load->cursor;
330 FT_Byte* limit = load->limit;
331 FT_GlyphLoader gloader = load->gloader;
332 FT_Int n_contours = load->n_contours;
333 FT_Outline* outline;
334 TT_Face face = (TT_Face)load->face;
335 FT_UShort n_ins;
336 FT_Int n_points;
337
338 FT_Byte *flag, *flag_limit;
339 FT_Byte c, count;
340 FT_Vector *vec, *vec_limit;
341 FT_Pos x;
342 FT_Short *cont, *cont_limit, prev_cont;
343 FT_Int xy_size = 0;
344
345
346 /* check that we can add the contours to the glyph */
347 error = FT_GLYPHLOADER_CHECK_POINTS( gloader, 0, n_contours );
348 if ( error )
349 goto Fail;
350
351 /* reading the contours' endpoints & number of points */
352 cont = gloader->current.outline.contours;
353 cont_limit = cont + n_contours;
354
355 /* check space for contours array + instructions count */
356 if ( n_contours >= 0xFFF || p + ( n_contours + 1 ) * 2 > limit )
357 goto Invalid_Outline;
358
359 prev_cont = FT_NEXT_USHORT( p );
360
361 if ( n_contours > 0 )
362 cont[0] = prev_cont;
363
364 for ( cont++; cont < cont_limit; cont++ )
365 {
366 cont[0] = FT_NEXT_USHORT( p );
367 if ( cont[0] <= prev_cont )
368 {
369 /* unordered contours: this is invalid */
370 error = FT_Err_Invalid_Table;
371 goto Fail;
372 }
373 prev_cont = cont[0];
374 }
375
376 n_points = 0;
377 if ( n_contours > 0 )
378 {
379 n_points = cont[-1] + 1;
380 if ( n_points < 0 )
381 goto Invalid_Outline;
382 }
383
384 /* note that we will add four phantom points later */
385 error = FT_GLYPHLOADER_CHECK_POINTS( gloader, n_points + 4, 0 );
386 if ( error )
387 goto Fail;
388
389 /* we'd better check the contours table right now */
390 outline = &gloader->current.outline;
391
392 for ( cont = outline->contours + 1; cont < cont_limit; cont++ )
393 if ( cont[-1] >= cont[0] )
394 goto Invalid_Outline;
395
396 /* reading the bytecode instructions */
397 load->glyph->control_len = 0;
398 load->glyph->control_data = 0;
399
400 if ( p + 2 > limit )
401 goto Invalid_Outline;
402
403 n_ins = FT_NEXT_USHORT( p );
404
405 FT_TRACE5(( " Instructions size: %u\n", n_ins ));
406
407 if ( n_ins > face->max_profile.maxSizeOfInstructions )
408 {
409 FT_TRACE0(( "TT_Load_Simple_Glyph: too many instructions (%d)\n",
410 n_ins ));
411 error = TT_Err_Too_Many_Hints;
412 goto Fail;
413 }
414
415 if ( ( limit - p ) < n_ins )
416 {
417 FT_TRACE0(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));
418 error = TT_Err_Too_Many_Hints;
419 goto Fail;
420 }
421
422 #ifdef TT_USE_BYTECODE_INTERPRETER
423
424 if ( IS_HINTED( load->load_flags ) )
425 {
426 load->glyph->control_len = n_ins;
427 load->glyph->control_data = load->exec->glyphIns;
428
429 FT_MEM_COPY( load->exec->glyphIns, p, (FT_Long)n_ins );
430 }
431
432 #endif /* TT_USE_BYTECODE_INTERPRETER */
433
434 p += n_ins;
435
436 /* reading the point tags */
437 flag = (FT_Byte*)outline->tags;
438 flag_limit = flag + n_points;
439
440 FT_ASSERT( flag != NULL );
441
442 while ( flag < flag_limit )
443 {
444 if ( p + 1 > limit )
445 goto Invalid_Outline;
446
447 *flag++ = c = FT_NEXT_BYTE( p );
448 if ( c & 8 )
449 {
450 if ( p + 1 > limit )
451 goto Invalid_Outline;
452
453 count = FT_NEXT_BYTE( p );
454 if ( flag + (FT_Int)count > flag_limit )
455 goto Invalid_Outline;
456
457 for ( ; count > 0; count-- )
458 *flag++ = c;
459 }
460 }
461
462 /* reading the X coordinates */
463
464 vec = outline->points;
465 vec_limit = vec + n_points;
466 flag = (FT_Byte*)outline->tags;
467 x = 0;
468
469 if ( p + xy_size > limit )
470 goto Invalid_Outline;
471
472 for ( ; vec < vec_limit; vec++, flag++ )
473 {
474 FT_Pos y = 0;
475 FT_Byte f = *flag;
476
477
478 if ( f & 2 )
479 {
480 if ( p + 1 > limit )
481 goto Invalid_Outline;
482
483 y = (FT_Pos)FT_NEXT_BYTE( p );
484 if ( ( f & 16 ) == 0 )
485 y = -y;
486 }
487 else if ( ( f & 16 ) == 0 )
488 {
489 if ( p + 2 > limit )
490 goto Invalid_Outline;
491
492 y = (FT_Pos)FT_NEXT_SHORT( p );
493 }
494
495 x += y;
496 vec->x = x;
497 /* the cast is for stupid compilers */
498 *flag = (FT_Byte)( f & ~( 2 | 16 ) );
499 }
500
501 /* reading the Y coordinates */
502
503 vec = gloader->current.outline.points;
504 vec_limit = vec + n_points;
505 flag = (FT_Byte*)outline->tags;
506 x = 0;
507
508 for ( ; vec < vec_limit; vec++, flag++ )
509 {
510 FT_Pos y = 0;
511 FT_Byte f = *flag;
512
513
514 if ( f & 4 )
515 {
516 if ( p + 1 > limit )
517 goto Invalid_Outline;
518
519 y = (FT_Pos)FT_NEXT_BYTE( p );
520 if ( ( f & 32 ) == 0 )
521 y = -y;
522 }
523 else if ( ( f & 32 ) == 0 )
524 {
525 if ( p + 2 > limit )
526 goto Invalid_Outline;
527
528 y = (FT_Pos)FT_NEXT_SHORT( p );
529 }
530
531 x += y;
532 vec->y = x;
533 /* the cast is for stupid compilers */
534 *flag = (FT_Byte)( f & FT_CURVE_TAG_ON );
535 }
536
537 outline->n_points = (FT_UShort)n_points;
538 outline->n_contours = (FT_Short) n_contours;
539
540 load->cursor = p;
541
542 Fail:
543 return error;
544
545 Invalid_Outline:
546 error = TT_Err_Invalid_Outline;
547 goto Fail;
548 }
549
550
551 FT_CALLBACK_DEF( FT_Error )
552 TT_Load_Composite_Glyph( TT_Loader loader )
553 {
554 FT_Error error;
555 FT_Byte* p = loader->cursor;
556 FT_Byte* limit = loader->limit;
557 FT_GlyphLoader gloader = loader->gloader;
558 FT_SubGlyph subglyph;
559 FT_UInt num_subglyphs;
560
561
562 num_subglyphs = 0;
563
564 do
565 {
566 FT_Fixed xx, xy, yy, yx;
567 FT_UInt count;
568
569
570 /* check that we can load a new subglyph */
571 error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs + 1 );
572 if ( error )
573 goto Fail;
574
575 /* check space */
576 if ( p + 4 > limit )
577 goto Invalid_Composite;
578
579 subglyph = gloader->current.subglyphs + num_subglyphs;
580
581 subglyph->arg1 = subglyph->arg2 = 0;
582
583 subglyph->flags = FT_NEXT_USHORT( p );
584 subglyph->index = FT_NEXT_USHORT( p );
585
586 /* check space */
587 count = 2;
588 if ( subglyph->flags & ARGS_ARE_WORDS )
589 count += 2;
590 if ( subglyph->flags & WE_HAVE_A_SCALE )
591 count += 2;
592 else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
593 count += 4;
594 else if ( subglyph->flags & WE_HAVE_A_2X2 )
595 count += 8;
596
597 if ( p + count > limit )
598 goto Invalid_Composite;
599
600 /* read arguments */
601 if ( subglyph->flags & ARGS_ARE_WORDS )
602 {
603 subglyph->arg1 = FT_NEXT_SHORT( p );
604 subglyph->arg2 = FT_NEXT_SHORT( p );
605 }
606 else
607 {
608 subglyph->arg1 = FT_NEXT_CHAR( p );
609 subglyph->arg2 = FT_NEXT_CHAR( p );
610 }
611
612 /* read transform */
613 xx = yy = 0x10000L;
614 xy = yx = 0;
615
616 if ( subglyph->flags & WE_HAVE_A_SCALE )
617 {
618 xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
619 yy = xx;
620 }
621 else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
622 {
623 xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
624 yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
625 }
626 else if ( subglyph->flags & WE_HAVE_A_2X2 )
627 {
628 xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
629 yx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
630 xy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
631 yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
632 }
633
634 subglyph->transform.xx = xx;
635 subglyph->transform.xy = xy;
636 subglyph->transform.yx = yx;
637 subglyph->transform.yy = yy;
638
639 num_subglyphs++;
640
641 } while ( subglyph->flags & MORE_COMPONENTS );
642
643 gloader->current.num_subglyphs = num_subglyphs;
644
645 #ifdef TT_USE_BYTECODE_INTERPRETER
646
647 {
648 FT_Stream stream = loader->stream;
649
650
651 /* we must undo the FT_FRAME_ENTER in order to point */
652 /* to the composite instructions, if we find some. */
653 /* We will process them later. */
654 /* */
655 loader->ins_pos = (FT_ULong)( FT_STREAM_POS() +
656 p - limit );
657 }
658
659 #endif
660
661 loader->cursor = p;
662
663 Fail:
664 return error;
665
666 Invalid_Composite:
667 error = TT_Err_Invalid_Composite;
668 goto Fail;
669 }
670
671
672 FT_LOCAL_DEF( void )
673 TT_Init_Glyph_Loading( TT_Face face )
674 {
675 face->access_glyph_frame = TT_Access_Glyph_Frame;
676 face->read_glyph_header = TT_Load_Glyph_Header;
677 face->read_simple_glyph = TT_Load_Simple_Glyph;
678 face->read_composite_glyph = TT_Load_Composite_Glyph;
679 face->forget_glyph_frame = TT_Forget_Glyph_Frame;
680 }
681
682
683 static void
684 tt_prepare_zone( TT_GlyphZone zone,
685 FT_GlyphLoad load,
686 FT_UInt start_point,
687 FT_UInt start_contour )
688 {
689 zone->n_points = (FT_UShort)( load->outline.n_points - start_point );
690 zone->n_contours = (FT_Short) ( load->outline.n_contours -
691 start_contour );
692 zone->org = load->extra_points + start_point;
693 zone->cur = load->outline.points + start_point;
694 zone->orus = load->extra_points2 + start_point;
695 zone->tags = (FT_Byte*)load->outline.tags + start_point;
696 zone->contours = (FT_UShort*)load->outline.contours + start_contour;
697 zone->first_point = (FT_UShort)start_point;
698 }
699
700
701 /*************************************************************************/
702 /* */
703 /* <Function> */
704 /* TT_Hint_Glyph */
705 /* */
706 /* <Description> */
707 /* Hint the glyph using the zone prepared by the caller. Note that */
708 /* the zone is supposed to include four phantom points. */
709 /* */
710 static FT_Error
711 TT_Hint_Glyph( TT_Loader loader,
712 FT_Bool is_composite )
713 {
714 TT_GlyphZone zone = &loader->zone;
715 FT_Pos origin;
716
717 #ifdef TT_USE_BYTECODE_INTERPRETER
718 FT_UInt n_ins;
719 #else
720 FT_UNUSED( is_composite );
721 #endif
722
723
724 #ifdef TT_USE_BYTECODE_INTERPRETER
725 if ( loader->glyph->control_len > 0xFFFFL )
726 {
727 FT_TRACE1(( "TT_Hint_Glyph: too long instructions " ));
728 FT_TRACE1(( "(0x%lx byte) is truncated\n",
729 loader->glyph->control_len ));
730 }
731 n_ins = (FT_UInt)( loader->glyph->control_len );
732 #endif
733
734 origin = zone->cur[zone->n_points - 4].x;
735 origin = FT_PIX_ROUND( origin ) - origin;
736 if ( origin )
737 translate_array( zone->n_points, zone->cur, origin, 0 );
738
739 #ifdef TT_USE_BYTECODE_INTERPRETER
740 /* save original point position in org */
741 if ( n_ins > 0 )
742 FT_ARRAY_COPY( zone->org, zone->cur, zone->n_points );
743
744 /* Reset graphics state. */
745 loader->exec->GS = ((TT_Size)loader->size)->GS;
746
747 /* XXX: UNDOCUMENTED! Hinting instructions of a composite glyph */
748 /* completely refer to the (already) hinted subglyphs. */
749 if ( is_composite )
750 {
751 loader->exec->metrics.x_scale = 1 << 16;
752 loader->exec->metrics.y_scale = 1 << 16;
753
754 FT_ARRAY_COPY( zone->orus, zone->cur, zone->n_points );
755 }
756 else
757 {
758 loader->exec->metrics.x_scale =
759 ((TT_Size)loader->size)->metrics.x_scale;
760 loader->exec->metrics.y_scale =
761 ((TT_Size)loader->size)->metrics.y_scale;
762 }
763 #endif
764
765 /* round pp2 and pp4 */
766 zone->cur[zone->n_points - 3].x =
767 FT_PIX_ROUND( zone->cur[zone->n_points - 3].x );
768 zone->cur[zone->n_points - 1].y =
769 FT_PIX_ROUND( zone->cur[zone->n_points - 1].y );
770
771 #ifdef TT_USE_BYTECODE_INTERPRETER
772
773 if ( n_ins > 0 )
774 {
775 FT_Bool debug;
776 FT_Error error;
777
778 FT_GlyphLoader gloader = loader->gloader;
779 FT_Outline current_outline = gloader->current.outline;
780
781
782 error = TT_Set_CodeRange( loader->exec, tt_coderange_glyph,
783 loader->exec->glyphIns, n_ins );
784 if ( error )
785 return error;
786
787 loader->exec->is_composite = is_composite;
788 loader->exec->pts = *zone;
789
790 debug = FT_BOOL( !( loader->load_flags & FT_LOAD_NO_SCALE ) &&
791 ((TT_Size)loader->size)->debug );
792
793 error = TT_Run_Context( loader->exec, debug );
794 if ( error && loader->exec->pedantic_hinting )
795 return error;
796
797 /* store drop-out mode in bits 5-7; set bit 2 also as a marker */
798 current_outline.tags[0] |=
799 ( loader->exec->GS.scan_type << 5 ) | FT_CURVE_TAG_HAS_SCANMODE;
800 }
801
802 #endif
803
804 /* save glyph phantom points */
805 if ( !loader->preserve_pps )
806 {
807 loader->pp1 = zone->cur[zone->n_points - 4];
808 loader->pp2 = zone->cur[zone->n_points - 3];
809 loader->pp3 = zone->cur[zone->n_points - 2];
810 loader->pp4 = zone->cur[zone->n_points - 1];
811 }
812
813 return TT_Err_Ok;
814 }
815
816
817 /*************************************************************************/
818 /* */
819 /* <Function> */
820 /* TT_Process_Simple_Glyph */
821 /* */
822 /* <Description> */
823 /* Once a simple glyph has been loaded, it needs to be processed. */
824 /* Usually, this means scaling and hinting through bytecode */
825 /* interpretation. */
826 /* */
827 static FT_Error
828 TT_Process_Simple_Glyph( TT_Loader loader )
829 {
830 FT_GlyphLoader gloader = loader->gloader;
831 FT_Error error = TT_Err_Ok;
832 FT_Outline* outline;
833 FT_Int n_points;
834
835
836 outline = &gloader->current.outline;
837 n_points = outline->n_points;
838
839 /* set phantom points */
840
841 outline->points[n_points ] = loader->pp1;
842 outline->points[n_points + 1] = loader->pp2;
843 outline->points[n_points + 2] = loader->pp3;
844 outline->points[n_points + 3] = loader->pp4;
845
846 outline->tags[n_points ] = 0;
847 outline->tags[n_points + 1] = 0;
848 outline->tags[n_points + 2] = 0;
849 outline->tags[n_points + 3] = 0;
850
851 n_points += 4;
852
853 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
854
855 if ( ((TT_Face)loader->face)->doblend )
856 {
857 /* Deltas apply to the unscaled data. */
858 FT_Vector* deltas;
859 FT_Memory memory = loader->face->memory;
860 FT_Int i;
861
862
863 error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
864 loader->glyph_index,
865 &deltas,
866 n_points );
867 if ( error )
868 return error;
869
870 for ( i = 0; i < n_points; ++i )
871 {
872 outline->points[i].x += deltas[i].x;
873 outline->points[i].y += deltas[i].y;
874 }
875
876 FT_FREE( deltas );
877 }
878
879 #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
880
881 if ( IS_HINTED( loader->load_flags ) )
882 {
883 tt_prepare_zone( &loader->zone, &gloader->current, 0, 0 );
884
885 FT_ARRAY_COPY( loader->zone.orus, loader->zone.cur,
886 loader->zone.n_points + 4 );
887 }
888
889 /* scale the glyph */
890 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
891 {
892 FT_Vector* vec = outline->points;
893 FT_Vector* limit = outline->points + n_points;
894 FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
895 FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
896
897
898 for ( ; vec < limit; vec++ )
899 {
900 vec->x = FT_MulFix( vec->x, x_scale );
901 vec->y = FT_MulFix( vec->y, y_scale );
902 }
903
904 loader->pp1 = outline->points[n_points - 4];
905 loader->pp2 = outline->points[n_points - 3];
906 loader->pp3 = outline->points[n_points - 2];
907 loader->pp4 = outline->points[n_points - 1];
908 }
909
910 if ( IS_HINTED( loader->load_flags ) )
911 {
912 loader->zone.n_points += 4;
913
914 error = TT_Hint_Glyph( loader, 0 );
915 }
916
917 return error;
918 }
919
920
921 /*************************************************************************/
922 /* */
923 /* <Function> */
924 /* TT_Process_Composite_Component */
925 /* */
926 /* <Description> */
927 /* Once a composite component has been loaded, it needs to be */
928 /* processed. Usually, this means transforming and translating. */
929 /* */
930 static FT_Error
931 TT_Process_Composite_Component( TT_Loader loader,
932 FT_SubGlyph subglyph,
933 FT_UInt start_point,
934 FT_UInt num_base_points )
935 {
936 FT_GlyphLoader gloader = loader->gloader;
937 FT_Vector* base_vec = gloader->base.outline.points;
938 FT_UInt num_points = gloader->base.outline.n_points;
939 FT_Bool have_scale;
940 FT_Pos x, y;
941
942
943 have_scale = FT_BOOL( subglyph->flags & ( WE_HAVE_A_SCALE |
944 WE_HAVE_AN_XY_SCALE |
945 WE_HAVE_A_2X2 ) );
946
947 /* perform the transform required for this subglyph */
948 if ( have_scale )
949 {
950 FT_UInt i;
951
952
953 for ( i = num_base_points; i < num_points; i++ )
954 FT_Vector_Transform( base_vec + i, &subglyph->transform );
955 }
956
957 /* get offset */
958 if ( !( subglyph->flags & ARGS_ARE_XY_VALUES ) )
959 {
960 FT_UInt k = subglyph->arg1;
961 FT_UInt l = subglyph->arg2;
962 FT_Vector* p1;
963 FT_Vector* p2;
964
965
966 /* match l-th point of the newly loaded component to the k-th point */
967 /* of the previously loaded components. */
968
969 /* change to the point numbers used by our outline */
970 k += start_point;
971 l += num_base_points;
972 if ( k >= num_base_points ||
973 l >= num_points )
974 return TT_Err_Invalid_Composite;
975
976 p1 = gloader->base.outline.points + k;
977 p2 = gloader->base.outline.points + l;
978
979 x = p1->x - p2->x;
980 y = p1->y - p2->y;
981 }
982 else
983 {
984 x = subglyph->arg1;
985 y = subglyph->arg2;
986
987 if ( !x && !y )
988 return TT_Err_Ok;
989
990 /* Use a default value dependent on */
991 /* TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED. This is useful for old TT */
992 /* fonts which don't set the xxx_COMPONENT_OFFSET bit. */
993
994 if ( have_scale &&
995 #ifdef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
996 !( subglyph->flags & UNSCALED_COMPONENT_OFFSET ) )
997 #else
998 ( subglyph->flags & SCALED_COMPONENT_OFFSET ) )
999 #endif
1000 {
1001
1002 #if 0
1003
1004 /*************************************************************************/
1005 /* */
1006 /* This algorithm is what Apple documents. But it doesn't work. */
1007 /* */
1008 int a = subglyph->transform.xx > 0 ? subglyph->transform.xx
1009 : -subglyph->transform.xx;
1010 int b = subglyph->transform.yx > 0 ? subglyph->transform.yx
1011 : -subglyph->transform.yx;
1012 int c = subglyph->transform.xy > 0 ? subglyph->transform.xy
1013 : -subglyph->transform.xy;
1014 int d = subglyph->transform.yy > 0 ? subglyph->transform.yy
1015 : -subglyph->transform.yy;
1016 int m = a > b ? a : b;
1017 int n = c > d ? c : d;
1018
1019
1020 if ( a - b <= 33 && a - b >= -33 )
1021 m *= 2;
1022 if ( c - d <= 33 && c - d >= -33 )
1023 n *= 2;
1024 x = FT_MulFix( x, m );
1025 y = FT_MulFix( y, n );
1026
1027 #else /* 0 */
1028
1029 /*************************************************************************/
1030 /* */
1031 /* This algorithm is a guess and works much better than the above. */
1032 /* */
1033 FT_Fixed mac_xscale = FT_SqrtFixed(
1034 (FT_Int32)FT_MulFix( subglyph->transform.xx,
1035 subglyph->transform.xx ) +
1036 (FT_Int32)FT_MulFix( subglyph->transform.xy,
1037 subglyph->transform.xy ) );
1038 FT_Fixed mac_yscale = FT_SqrtFixed(
1039 (FT_Int32)FT_MulFix( subglyph->transform.yy,
1040 subglyph->transform.yy ) +
1041 (FT_Int32)FT_MulFix( subglyph->transform.yx,
1042 subglyph->transform.yx ) );
1043
1044
1045 x = FT_MulFix( x, mac_xscale );
1046 y = FT_MulFix( y, mac_yscale );
1047
1048 #endif /* 0 */
1049
1050 }
1051
1052 if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
1053 {
1054 FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
1055 FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
1056
1057
1058 x = FT_MulFix( x, x_scale );
1059 y = FT_MulFix( y, y_scale );
1060
1061 if ( subglyph->flags & ROUND_XY_TO_GRID )
1062 {
1063 x = FT_PIX_ROUND( x );
1064 y = FT_PIX_ROUND( y );
1065 }
1066 }
1067 }
1068
1069 if ( x || y )
1070 translate_array( num_points - num_base_points,
1071 base_vec + num_base_points,
1072 x, y );
1073
1074 return TT_Err_Ok;
1075 }
1076
1077
1078 /*************************************************************************/
1079 /* */
1080 /* <Function> */
1081 /* TT_Process_Composite_Glyph */
1082 /* */
1083 /* <Description> */
1084 /* This is slightly different from TT_Process_Simple_Glyph, in that */
1085 /* its sole purpose is to hint the glyph. Thus this function is */
1086 /* only available when bytecode interpreter is enabled. */
1087 /* */
1088 static FT_Error
1089 TT_Process_Composite_Glyph( TT_Loader loader,
1090 FT_UInt start_point,
1091 FT_UInt start_contour )
1092 {
1093 FT_Error error;
1094 FT_Outline* outline;
1095 FT_UInt i;
1096
1097
1098 outline = &loader->gloader->base.outline;
1099
1100 /* make room for phantom points */
1101 error = FT_GLYPHLOADER_CHECK_POINTS( loader->gloader,
1102 outline->n_points + 4,
1103 0 );
1104 if ( error )
1105 return error;
1106
1107 outline->points[outline->n_points ] = loader->pp1;
1108 outline->points[outline->n_points + 1] = loader->pp2;
1109 outline->points[outline->n_points + 2] = loader->pp3;
1110 outline->points[outline->n_points + 3] = loader->pp4;
1111
1112 outline->tags[outline->n_points ] = 0;
1113 outline->tags[outline->n_points + 1] = 0;
1114 outline->tags[outline->n_points + 2] = 0;
1115 outline->tags[outline->n_points + 3] = 0;
1116
1117 #ifdef TT_USE_BYTECODE_INTERPRETER
1118
1119 {
1120 FT_Stream stream = loader->stream;
1121 FT_UShort n_ins;
1122
1123
1124 /* TT_Load_Composite_Glyph only gives us the offset of instructions */
1125 /* so we read them here */
1126 if ( FT_STREAM_SEEK( loader->ins_pos ) ||
1127 FT_READ_USHORT( n_ins ) )
1128 return error;
1129
1130 FT_TRACE5(( " Instructions size = %d\n", n_ins ));
1131
1132 /* check it */
1133 if ( n_ins > ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions )
1134 {
1135 FT_TRACE0(( "TT_Process_Composite_Glyph: too many instructions (%d)\n",
1136 n_ins ));
1137
1138 return TT_Err_Too_Many_Hints;
1139 }
1140 else if ( n_ins == 0 )
1141 return TT_Err_Ok;
1142
1143 if ( FT_STREAM_READ( loader->exec->glyphIns, n_ins ) )
1144 return error;
1145
1146 loader->glyph->control_data = loader->exec->glyphIns;
1147 loader->glyph->control_len = n_ins;
1148 }
1149
1150 #endif
1151
1152 tt_prepare_zone( &loader->zone, &loader->gloader->base,
1153 start_point, start_contour );
1154
1155 /* Some points are likely touched during execution of */
1156 /* instructions on components. So let's untouch them. */
1157 for ( i = start_point; i < loader->zone.n_points; i++ )
1158 loader->zone.tags[i] &= ~FT_CURVE_TAG_TOUCH_BOTH;
1159
1160 loader->zone.n_points += 4;
1161
1162 return TT_Hint_Glyph( loader, 1 );
1163 }
1164
1165
1166 /* Calculate the four phantom points. */
1167 /* The first two stand for horizontal origin and advance. */
1168 /* The last two stand for vertical origin and advance. */
1169 #define TT_LOADER_SET_PP( loader ) \
1170 do { \
1171 (loader)->pp1.x = (loader)->bbox.xMin - (loader)->left_bearing; \
1172 (loader)->pp1.y = 0; \
1173 (loader)->pp2.x = (loader)->pp1.x + (loader)->advance; \
1174 (loader)->pp2.y = 0; \
1175 (loader)->pp3.x = 0; \
1176 (loader)->pp3.y = (loader)->top_bearing + (loader)->bbox.yMax; \
1177 (loader)->pp4.x = 0; \
1178 (loader)->pp4.y = (loader)->pp3.y - (loader)->vadvance; \
1179 } while ( 0 )
1180
1181
1182 /*************************************************************************/
1183 /* */
1184 /* <Function> */
1185 /* load_truetype_glyph */
1186 /* */
1187 /* <Description> */
1188 /* Loads a given truetype glyph. Handles composites and uses a */
1189 /* TT_Loader object. */
1190 /* */
1191 static FT_Error
1192 load_truetype_glyph( TT_Loader loader,
1193 FT_UInt glyph_index,
1194 FT_UInt recurse_count,
1195 FT_Bool header_only )
1196 {
1197 FT_Error error = TT_Err_Ok;
1198 FT_Fixed x_scale, y_scale;
1199 FT_ULong offset;
1200 TT_Face face = (TT_Face)loader->face;
1201 FT_GlyphLoader gloader = loader->gloader;
1202 FT_Bool opened_frame = 0;
1203
1204 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1205 FT_Vector* deltas = NULL;
1206 #endif
1207
1208 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1209 FT_StreamRec inc_stream;
1210 FT_Data glyph_data;
1211 FT_Bool glyph_data_loaded = 0;
1212 #endif
1213
1214
1215 /* some fonts have an incorrect value of `maxComponentDepth', */
1216 /* thus we allow depth 1 to catch the majority of them */
1217 if ( recurse_count > 1 &&
1218 recurse_count > face->max_profile.maxComponentDepth )
1219 {
1220 error = TT_Err_Invalid_Composite;
1221 goto Exit;
1222 }
1223
1224 /* check glyph index */
1225 if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
1226 {
1227 error = TT_Err_Invalid_Glyph_Index;
1228 goto Exit;
1229 }
1230
1231 loader->glyph_index = glyph_index;
1232
1233 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1234 {
1235 x_scale = ((TT_Size)loader->size)->metrics.x_scale;
1236 y_scale = ((TT_Size)loader->size)->metrics.y_scale;
1237 }
1238 else
1239 {
1240 x_scale = 0x10000L;
1241 y_scale = 0x10000L;
1242 }
1243
1244 tt_get_metrics( loader, glyph_index );
1245
1246 /* Set `offset' to the start of the glyph relative to the start of */
1247 /* the `glyf' table, and `byte_len' to the length of the glyph in */
1248 /* bytes. */
1249
1250 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1251
1252 /* If we are loading glyph data via the incremental interface, set */
1253 /* the loader stream to a memory stream reading the data returned */
1254 /* by the interface. */
1255 if ( face->root.internal->incremental_interface )
1256 {
1257 error = face->root.internal->incremental_interface->funcs->get_glyph_data(
1258 face->root.internal->incremental_interface->object,
1259 glyph_index, &glyph_data );
1260 if ( error )
1261 goto Exit;
1262
1263 glyph_data_loaded = 1;
1264 offset = 0;
1265 loader->byte_len = glyph_data.length;
1266
1267 FT_MEM_ZERO( &inc_stream, sizeof ( inc_stream ) );
1268 FT_Stream_OpenMemory( &inc_stream,
1269 glyph_data.pointer, glyph_data.length );
1270
1271 loader->stream = &inc_stream;
1272 }
1273 else
1274
1275 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
1276
1277 offset = tt_face_get_location( face, glyph_index,
1278 (FT_UInt*)&loader->byte_len );
1279
1280 if ( loader->byte_len > 0 )
1281 {
1282 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1283 /* for the incremental interface, `glyf_offset' is always zero */
1284 if ( !loader->glyf_offset &&
1285 !face->root.internal->incremental_interface )
1286 #else
1287 if ( !loader->glyf_offset )
1288 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
1289 {
1290 FT_TRACE2(( "no `glyf' table but non-zero `loca' entry\n" ));
1291 error = TT_Err_Invalid_Table;
1292 goto Exit;
1293 }
1294
1295 error = face->access_glyph_frame( loader, glyph_index,
1296 loader->glyf_offset + offset,
1297 loader->byte_len );
1298 if ( error )
1299 goto Exit;
1300
1301 opened_frame = 1;
1302
1303 /* read glyph header first */
1304 error = face->read_glyph_header( loader );
1305 if ( error || header_only )
1306 goto Exit;
1307 }
1308
1309 if ( loader->byte_len == 0 || loader->n_contours == 0 )
1310 {
1311 loader->bbox.xMin = 0;
1312 loader->bbox.xMax = 0;
1313 loader->bbox.yMin = 0;
1314 loader->bbox.yMax = 0;
1315
1316 if ( header_only )
1317 goto Exit;
1318
1319 TT_LOADER_SET_PP( loader );
1320
1321 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1322
1323 if ( ((TT_Face)(loader->face))->doblend )
1324 {
1325 /* this must be done before scaling */
1326 FT_Memory memory = loader->face->memory;
1327
1328
1329 error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
1330 glyph_index, &deltas, 4 );
1331 if ( error )
1332 goto Exit;
1333
1334 loader->pp1.x += deltas[0].x; loader->pp1.y += deltas[0].y;
1335 loader->pp2.x += deltas[1].x; loader->pp2.y += deltas[1].y;
1336 loader->pp3.x += deltas[2].x; loader->pp3.y += deltas[2].y;
1337 loader->pp4.x += deltas[3].x; loader->pp4.y += deltas[3].y;
1338
1339 FT_FREE( deltas );
1340 }
1341
1342 #endif
1343
1344 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1345 {
1346 loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
1347 loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
1348 loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );
1349 loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );
1350 }
1351
1352 error = TT_Err_Ok;
1353 goto Exit;
1354 }
1355
1356 TT_LOADER_SET_PP( loader );
1357
1358 /***********************************************************************/
1359 /***********************************************************************/
1360 /***********************************************************************/
1361
1362 /* if it is a simple glyph, load it */
1363
1364 if ( loader->n_contours > 0 )
1365 {
1366 error = face->read_simple_glyph( loader );
1367 if ( error )
1368 goto Exit;
1369
1370 /* all data have been read */
1371 face->forget_glyph_frame( loader );
1372 opened_frame = 0;
1373
1374 error = TT_Process_Simple_Glyph( loader );
1375 if ( error )
1376 goto Exit;
1377
1378 FT_GlyphLoader_Add( gloader );
1379 }
1380
1381 /***********************************************************************/
1382 /***********************************************************************/
1383 /***********************************************************************/
1384
1385 /* otherwise, load a composite! */
1386 else if ( loader->n_contours == -1 )
1387 {
1388 FT_UInt start_point;
1389 FT_UInt start_contour;
1390 FT_ULong ins_pos; /* position of composite instructions, if any */
1391
1392
1393 start_point = gloader->base.outline.n_points;
1394 start_contour = gloader->base.outline.n_contours;
1395
1396 /* for each subglyph, read composite header */
1397 error = face->read_composite_glyph( loader );
1398 if ( error )
1399 goto Exit;
1400
1401 /* store the offset of instructions */
1402 ins_pos = loader->ins_pos;
1403
1404 /* all data we need are read */
1405 face->forget_glyph_frame( loader );
1406 opened_frame = 0;
1407
1408 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1409
1410 if ( face->doblend )
1411 {
1412 FT_Int i, limit;
1413 FT_SubGlyph subglyph;
1414 FT_Memory memory = face->root.memory;
1415
1416
1417 /* this provides additional offsets */
1418 /* for each component's translation */
1419
1420 if ( ( error = TT_Vary_Get_Glyph_Deltas(
1421 face,
1422 glyph_index,
1423 &deltas,
1424 gloader->current.num_subglyphs + 4 )) != 0 )
1425 goto Exit;
1426
1427 subglyph = gloader->current.subglyphs + gloader->base.num_subglyphs;
1428 limit = gloader->current.num_subglyphs;
1429
1430 for ( i = 0; i < limit; ++i, ++subglyph )
1431 {
1432 if ( subglyph->flags & ARGS_ARE_XY_VALUES )
1433 {
1434 /* XXX: overflow check for subglyph->{arg1,arg2}. */
1435 /* deltas[i].{x,y} must be within signed 16-bit, */
1436 /* but the restriction of summed delta is not clear */
1437 subglyph->arg1 += (FT_Int16)deltas[i].x;
1438 subglyph->arg2 += (FT_Int16)deltas[i].y;
1439 }
1440 }
1441
1442 loader->pp1.x += deltas[i + 0].x; loader->pp1.y += deltas[i + 0].y;
1443 loader->pp2.x += deltas[i + 1].x; loader->pp2.y += deltas[i + 1].y;
1444 loader->pp3.x += deltas[i + 2].x; loader->pp3.y += deltas[i + 2].y;
1445 loader->pp4.x += deltas[i + 3].x; loader->pp4.y += deltas[i + 3].y;
1446
1447 FT_FREE( deltas );
1448 }
1449
1450 #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
1451
1452 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1453 {
1454 loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
1455 loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
1456 loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );
1457 loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );
1458 }
1459
1460 /* if the flag FT_LOAD_NO_RECURSE is set, we return the subglyph */
1461 /* `as is' in the glyph slot (the client application will be */
1462 /* responsible for interpreting these data)... */
1463 if ( loader->load_flags & FT_LOAD_NO_RECURSE )
1464 {
1465 FT_GlyphLoader_Add( gloader );
1466 loader->glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
1467
1468 goto Exit;
1469 }
1470
1471 /*********************************************************************/
1472 /*********************************************************************/
1473 /*********************************************************************/
1474
1475 {
1476 FT_UInt n, num_base_points;
1477 FT_SubGlyph subglyph = 0;
1478
1479 FT_UInt num_points = start_point;
1480 FT_UInt num_subglyphs = gloader->current.num_subglyphs;
1481 FT_UInt num_base_subgs = gloader->base.num_subglyphs;
1482
1483 FT_Stream old_stream = loader->stream;
1484
1485
1486 FT_GlyphLoader_Add( gloader );
1487
1488 /* read each subglyph independently */
1489 for ( n = 0; n < num_subglyphs; n++ )
1490 {
1491 FT_Vector pp[4];
1492
1493
1494 /* Each time we call load_truetype_glyph in this loop, the */
1495 /* value of `gloader.base.subglyphs' can change due to table */
1496 /* reallocations. We thus need to recompute the subglyph */
1497 /* pointer on each iteration. */
1498 subglyph = gloader->base.subglyphs + num_base_subgs + n;
1499
1500 pp[0] = loader->pp1;
1501 pp[1] = loader->pp2;
1502 pp[2] = loader->pp3;
1503 pp[3] = loader->pp4;
1504
1505 num_base_points = gloader->base.outline.n_points;
1506
1507 error = load_truetype_glyph( loader, subglyph->index,
1508 recurse_count + 1, FALSE );
1509 if ( error )
1510 goto Exit;
1511
1512 /* restore subglyph pointer */
1513 subglyph = gloader->base.subglyphs + num_base_subgs + n;
1514
1515 if ( !( subglyph->flags & USE_MY_METRICS ) )
1516 {
1517 loader->pp1 = pp[0];
1518 loader->pp2 = pp[1];
1519 loader->pp3 = pp[2];
1520 loader->pp4 = pp[3];
1521 }
1522
1523 num_points = gloader->base.outline.n_points;
1524
1525 if ( num_points == num_base_points )
1526 continue;
1527
1528 /* gloader->base.outline consists of three parts: */
1529 /* 0 -(1)-> start_point -(2)-> num_base_points -(3)-> n_points. */
1530 /* */
1531 /* (1): exists from the beginning */
1532 /* (2): components that have been loaded so far */
1533 /* (3): the newly loaded component */
1534 TT_Process_Composite_Component( loader, subglyph, start_point,
1535 num_base_points );
1536 }
1537
1538 loader->stream = old_stream;
1539
1540 /* process the glyph */
1541 loader->ins_pos = ins_pos;
1542 if ( IS_HINTED( loader->load_flags ) &&
1543
1544 #ifdef TT_USE_BYTECODE_INTERPRETER
1545
1546 subglyph->flags & WE_HAVE_INSTR &&
1547
1548 #endif
1549
1550 num_points > start_point )
1551 TT_Process_Composite_Glyph( loader, start_point, start_contour );
1552
1553 }
1554 }
1555 else
1556 {
1557 /* invalid composite count (negative but not -1) */
1558 error = TT_Err_Invalid_Outline;
1559 goto Exit;
1560 }
1561
1562 /***********************************************************************/
1563 /***********************************************************************/
1564 /***********************************************************************/
1565
1566 Exit:
1567
1568 if ( opened_frame )
1569 face->forget_glyph_frame( loader );
1570
1571 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1572
1573 if ( glyph_data_loaded )
1574 face->root.internal->incremental_interface->funcs->free_glyph_data(
1575 face->root.internal->incremental_interface->object,
1576 &glyph_data );
1577
1578 #endif
1579
1580 return error;
1581 }
1582
1583
1584 static FT_Error
1585 compute_glyph_metrics( TT_Loader loader,
1586 FT_UInt glyph_index )
1587 {
1588 FT_BBox bbox;
1589 TT_Face face = (TT_Face)loader->face;
1590 FT_Fixed y_scale;
1591 TT_GlyphSlot glyph = loader->glyph;
1592 TT_Size size = (TT_Size)loader->size;
1593
1594
1595 y_scale = 0x10000L;
1596 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1597 y_scale = size->root.metrics.y_scale;
1598
1599 if ( glyph->format != FT_GLYPH_FORMAT_COMPOSITE )
1600 FT_Outline_Get_CBox( &glyph->outline, &bbox );
1601 else
1602 bbox = loader->bbox;
1603
1604 /* get the device-independent horizontal advance; it is scaled later */
1605 /* by the base layer. */
1606 {
1607 FT_Pos advance = loader->linear;
1608
1609
1610 /* the flag FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH was introduced to */
1611 /* correctly support DynaLab fonts, which have an incorrect */
1612 /* `advance_Width_Max' field! It is used, to my knowledge, */
1613 /* exclusively in the X-TrueType font server. */
1614 /* */
1615 if ( face->postscript.isFixedPitch &&
1616 ( loader->load_flags & FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ) == 0 )
1617 advance = face->horizontal.advance_Width_Max;
1618
1619 /* we need to return the advance in font units in linearHoriAdvance, */
1620 /* it will be scaled later by the base layer. */
1621 glyph->linearHoriAdvance = advance;
1622 }
1623
1624 glyph->metrics.horiBearingX = bbox.xMin;
1625 glyph->metrics.horiBearingY = bbox.yMax;
1626 glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
1627
1628 /* adjust advance width to the value contained in the hdmx table */
1629 if ( !face->postscript.isFixedPitch &&
1630 IS_HINTED( loader->load_flags ) )
1631 {
1632 FT_Byte* widthp;
1633
1634
1635 widthp = tt_face_get_device_metrics( face,
1636 size->root.metrics.x_ppem,
1637 glyph_index );
1638
1639 if ( widthp )
1640 glyph->metrics.horiAdvance = *widthp << 6;
1641 }
1642
1643 /* set glyph dimensions */
1644 glyph->metrics.width = bbox.xMax - bbox.xMin;
1645 glyph->metrics.height = bbox.yMax - bbox.yMin;
1646
1647 /* Now take care of vertical metrics. In the case where there is */
1648 /* no vertical information within the font (relatively common), */
1649 /* create some metrics manually */
1650 {
1651 FT_Pos top; /* scaled vertical top side bearing */
1652 FT_Pos advance; /* scaled vertical advance height */
1653
1654
1655 /* Get the unscaled top bearing and advance height. */
1656 if ( face->vertical_info &&
1657 face->vertical.number_Of_VMetrics > 0 )
1658 {
1659 top = (FT_Short)FT_DivFix( loader->pp3.y - bbox.yMax,
1660 y_scale );
1661
1662 if ( loader->pp3.y <= loader->pp4.y )
1663 advance = 0;
1664 else
1665 advance = (FT_UShort)FT_DivFix( loader->pp3.y - loader->pp4.y,
1666 y_scale );
1667 }
1668 else
1669 {
1670 FT_Pos height;
1671
1672
1673 /* XXX Compute top side bearing and advance height in */
1674 /* Get_VMetrics instead of here. */
1675
1676 /* NOTE: The OS/2 values are the only `portable' ones, */
1677 /* which is why we use them, if there is an OS/2 */
1678 /* table in the font. Otherwise, we use the */
1679 /* values defined in the horizontal header. */
1680
1681 height = (FT_Short)FT_DivFix( bbox.yMax - bbox.yMin,
1682 y_scale );
1683 if ( face->os2.version != 0xFFFFU )
1684 advance = (FT_Pos)( face->os2.sTypoAscender -
1685 face->os2.sTypoDescender );
1686 else
1687 advance = (FT_Pos)( face->horizontal.Ascender -
1688 face->horizontal.Descender );
1689
1690 top = ( advance - height ) / 2;
1691 }
1692
1693 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1694 {
1695 FT_Incremental_InterfaceRec* incr;
1696 FT_Incremental_MetricsRec metrics;
1697 FT_Error error;
1698
1699
1700 incr = face->root.internal->incremental_interface;
1701
1702 /* If this is an incrementally loaded font see if there are */
1703 /* overriding metrics for this glyph. */
1704 if ( incr && incr->funcs->get_glyph_metrics )
1705 {
1706 metrics.bearing_x = 0;
1707 metrics.bearing_y = top;
1708 metrics.advance = advance;
1709
1710 error = incr->funcs->get_glyph_metrics( incr->object,
1711 glyph_index,
1712 TRUE,
1713 &metrics );
1714 if ( error )
1715 return error;
1716
1717 top = metrics.bearing_y;
1718 advance = metrics.advance;
1719 }
1720 }
1721
1722 /* GWW: Do vertical metrics get loaded incrementally too? */
1723
1724 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
1725
1726 glyph->linearVertAdvance = advance;
1727
1728 /* scale the metrics */
1729 if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
1730 {
1731 top = FT_MulFix( top, y_scale );
1732 advance = FT_MulFix( advance, y_scale );
1733 }
1734
1735 /* XXX: for now, we have no better algorithm for the lsb, but it */
1736 /* should work fine. */
1737 /* */
1738 glyph->metrics.vertBearingX = glyph->metrics.horiBearingX -
1739 glyph->metrics.horiAdvance / 2;
1740 glyph->metrics.vertBearingY = top;
1741 glyph->metrics.vertAdvance = advance;
1742 }
1743
1744 return 0;
1745 }
1746
1747
1748 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
1749
1750 static FT_Error
1751 load_sbit_image( TT_Size size,
1752 TT_GlyphSlot glyph,
1753 FT_UInt glyph_index,
1754 FT_Int32 load_flags )
1755 {
1756 TT_Face face;
1757 SFNT_Service sfnt;
1758 FT_Stream stream;
1759 FT_Error error;
1760 TT_SBit_MetricsRec metrics;
1761
1762
1763 face = (TT_Face)glyph->face;
1764 sfnt = (SFNT_Service)face->sfnt;
1765 stream = face->root.stream;
1766
1767 error = sfnt->load_sbit_image( face,
1768 size->strike_index,
1769 glyph_index,
1770 (FT_Int)load_flags,
1771 stream,
1772 &glyph->bitmap,
1773 &metrics );
1774 if ( !error )
1775 {
1776 glyph->outline.n_points = 0;
1777 glyph->outline.n_contours = 0;
1778
1779 glyph->metrics.width = (FT_Pos)metrics.width << 6;
1780 glyph->metrics.height = (FT_Pos)metrics.height << 6;
1781
1782 glyph->metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6;
1783 glyph->metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6;
1784 glyph->metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6;
1785
1786 glyph->metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6;
1787 glyph->metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6;
1788 glyph->metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6;
1789
1790 glyph->format = FT_GLYPH_FORMAT_BITMAP;
1791
1792 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
1793 {
1794 glyph->bitmap_left = metrics.vertBearingX;
1795 glyph->bitmap_top = metrics.vertBearingY;
1796 }
1797 else
1798 {
1799 glyph->bitmap_left = metrics.horiBearingX;
1800 glyph->bitmap_top = metrics.horiBearingY;
1801 }
1802 }
1803
1804 return error;
1805 }
1806
1807 #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
1808
1809
1810 static FT_Error
1811 tt_loader_init( TT_Loader loader,
1812 TT_Size size,
1813 TT_GlyphSlot glyph,
1814 FT_Int32 load_flags,
1815 FT_Bool glyf_table_only )
1816 {
1817 TT_Face face;
1818 FT_Stream stream;
1819
1820
1821 face = (TT_Face)glyph->face;
1822 stream = face->root.stream;
1823
1824 FT_MEM_ZERO( loader, sizeof ( TT_LoaderRec ) );
1825
1826 #ifdef TT_USE_BYTECODE_INTERPRETER
1827
1828 /* load execution context */
1829 if ( IS_HINTED( load_flags ) && !glyf_table_only )
1830 {
1831 TT_ExecContext exec;
1832 FT_Bool grayscale;
1833
1834
1835 if ( !size->cvt_ready )
1836 {
1837 FT_Error error = tt_size_ready_bytecode( size );
1838 if ( error )
1839 return error;
1840 }
1841
1842 /* query new execution context */
1843 exec = size->debug ? size->context
1844 : ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
1845 if ( !exec )
1846 return TT_Err_Could_Not_Find_Context;
1847
1848 grayscale =
1849 FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) != FT_RENDER_MODE_MONO );
1850
1851 TT_Load_Context( exec, face, size );
1852
1853 /* a change from mono to grayscale rendering (and vice versa) */
1854 /* requires a re-execution of the CVT program */
1855 if ( grayscale != exec->grayscale )
1856 {
1857 FT_UInt i;
1858
1859
1860 exec->grayscale = grayscale;
1861
1862 for ( i = 0; i < size->cvt_size; i++ )
1863 size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
1864 tt_size_run_prep( size );
1865 }
1866
1867 /* see whether the cvt program has disabled hinting */
1868 if ( exec->GS.instruct_control & 1 )
1869 load_flags |= FT_LOAD_NO_HINTING;
1870
1871 /* load default graphics state -- if needed */
1872 if ( exec->GS.instruct_control & 2 )
1873 exec->GS = tt_default_graphics_state;
1874
1875 exec->pedantic_hinting = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );
1876 loader->exec = exec;
1877 loader->instructions = exec->glyphIns;
1878 }
1879
1880 #endif /* TT_USE_BYTECODE_INTERPRETER */
1881
1882 /* seek to the beginning of the glyph table -- for Type 42 fonts */
1883 /* the table might be accessed from a Postscript stream or something */
1884 /* else... */
1885
1886 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1887
1888 if ( face->root.internal->incremental_interface )
1889 loader->glyf_offset = 0;
1890 else
1891
1892 #endif
1893
1894 {
1895 FT_Error error = face->goto_table( face, TTAG_glyf, stream, 0 );
1896
1897
1898 if ( error == TT_Err_Table_Missing )
1899 loader->glyf_offset = 0;
1900 else if ( error )
1901 {
1902 FT_ERROR(( "tt_loader_init: could not access glyph table\n" ));
1903 return error;
1904 }
1905 else
1906 loader->glyf_offset = FT_STREAM_POS();
1907 }
1908
1909 /* get face's glyph loader */
1910 if ( !glyf_table_only )
1911 {
1912 FT_GlyphLoader gloader = glyph->internal->loader;
1913
1914
1915 FT_GlyphLoader_Rewind( gloader );
1916 loader->gloader = gloader;
1917 }
1918
1919 loader->load_flags = load_flags;
1920
1921 loader->face = (FT_Face)face;
1922 loader->size = (FT_Size)size;
1923 loader->glyph = (FT_GlyphSlot)glyph;
1924 loader->stream = stream;
1925
1926 return TT_Err_Ok;
1927 }
1928
1929
1930 /*************************************************************************/
1931 /* */
1932 /* <Function> */
1933 /* TT_Load_Glyph */
1934 /* */
1935 /* <Description> */
1936 /* A function used to load a single glyph within a given glyph slot, */
1937 /* for a given size. */
1938 /* */
1939 /* <Input> */
1940 /* glyph :: A handle to a target slot object where the glyph */
1941 /* will be loaded. */
1942 /* */
1943 /* size :: A handle to the source face size at which the glyph */
1944 /* must be scaled/loaded. */
1945 /* */
1946 /* glyph_index :: The index of the glyph in the font file. */
1947 /* */
1948 /* load_flags :: A flag indicating what to load for this glyph. The */
1949 /* FT_LOAD_XXX constants can be used to control the */
1950 /* glyph loading process (e.g., whether the outline */
1951 /* should be scaled, whether to load bitmaps or not, */
1952 /* whether to hint the outline, etc). */
1953 /* */
1954 /* <Return> */
1955 /* FreeType error code. 0 means success. */
1956 /* */
1957 FT_LOCAL_DEF( FT_Error )
1958 TT_Load_Glyph( TT_Size size,
1959 TT_GlyphSlot glyph,
1960 FT_UInt glyph_index,
1961 FT_Int32 load_flags )
1962 {
1963 TT_Face face;
1964 FT_Error error;
1965 TT_LoaderRec loader;
1966
1967
1968 face = (TT_Face)glyph->face;
1969 error = TT_Err_Ok;
1970
1971 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
1972
1973 /* try to load embedded bitmap if any */
1974 /* */
1975 /* XXX: The convention should be emphasized in */
1976 /* the documents because it can be confusing. */
1977 if ( size->strike_index != 0xFFFFFFFFUL &&
1978 ( load_flags & FT_LOAD_NO_BITMAP ) == 0 )
1979 {
1980 error = load_sbit_image( size, glyph, glyph_index, load_flags );
1981 if ( !error )
1982 {
1983 FT_Face root = &face->root;
1984
1985
1986 if ( FT_IS_SCALABLE( root ) )
1987 {
1988 /* for the bbox we need the header only */
1989 (void)tt_loader_init( &loader, size, glyph, load_flags, TRUE );
1990 (void)load_truetype_glyph( &loader, glyph_index, 0, TRUE );
1991 glyph->linearHoriAdvance = loader.linear;
1992 glyph->linearVertAdvance = loader.top_bearing + loader.bbox.yMax -
1993 loader.vadvance;
1994 if ( face->postscript.isFixedPitch &&
1995 ( load_flags & FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ) == 0 )
1996 glyph->linearHoriAdvance = face->horizontal.advance_Width_Max;
1997 }
1998
1999 return TT_Err_Ok;
2000 }
2001 }
2002
2003 #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
2004
2005 /* if FT_LOAD_NO_SCALE is not set, `ttmetrics' must be valid */
2006 if ( !( load_flags & FT_LOAD_NO_SCALE ) && !size->ttmetrics.valid )
2007 return TT_Err_Invalid_Size_Handle;
2008
2009 if ( load_flags & FT_LOAD_SBITS_ONLY )
2010 return TT_Err_Invalid_Argument;
2011
2012 error = tt_loader_init( &loader, size, glyph, load_flags, FALSE );
2013 if ( error )
2014 return error;
2015
2016 glyph->format = FT_GLYPH_FORMAT_OUTLINE;
2017 glyph->num_subglyphs = 0;
2018 glyph->outline.flags = 0;
2019
2020 /* main loading loop */
2021 error = load_truetype_glyph( &loader, glyph_index, 0, FALSE );
2022 if ( !error )
2023 {
2024 if ( glyph->format == FT_GLYPH_FORMAT_COMPOSITE )
2025 {
2026 glyph->num_subglyphs = loader.gloader->base.num_subglyphs;
2027 glyph->subglyphs = loader.gloader->base.subglyphs;
2028 }
2029 else
2030 {
2031 glyph->outline = loader.gloader->base.outline;
2032 glyph->outline.flags &= ~FT_OUTLINE_SINGLE_PASS;
2033
2034 /* In case bit 1 of the `flags' field in the `head' table isn't */
2035 /* set, translate array so that (0,0) is the glyph's origin. */
2036 if ( ( face->header.Flags & 2 ) == 0 && loader.pp1.x )
2037 FT_Outline_Translate( &glyph->outline, -loader.pp1.x, 0 );
2038 }
2039
2040 #ifdef TT_USE_BYTECODE_INTERPRETER
2041
2042 if ( IS_HINTED( load_flags ) )
2043 {
2044 if ( loader.exec->GS.scan_control )
2045 {
2046 /* convert scan conversion mode to FT_OUTLINE_XXX flags */
2047 switch ( loader.exec->GS.scan_type )
2048 {
2049 case 0: /* simple drop-outs including stubs */
2050 glyph->outline.flags |= FT_OUTLINE_INCLUDE_STUBS;
2051 break;
2052 case 1: /* simple drop-outs excluding stubs */
2053 /* nothing; it's the default rendering mode */
2054 break;
2055 case 4: /* smart drop-outs including stubs */
2056 glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS |
2057 FT_OUTLINE_INCLUDE_STUBS;
2058 break;
2059 case 5: /* smart drop-outs excluding stubs */
2060 glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS;
2061 break;
2062
2063 default: /* no drop-out control */
2064 glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
2065 break;
2066 }
2067 }
2068 else
2069 glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
2070 }
2071
2072 #endif /* TT_USE_BYTECODE_INTERPRETER */
2073
2074 compute_glyph_metrics( &loader, glyph_index );
2075 }
2076
2077 /* Set the `high precision' bit flag. */
2078 /* This is _critical_ to get correct output for monochrome */
2079 /* TrueType glyphs at all sizes using the bytecode interpreter. */
2080 /* */
2081 if ( !( load_flags & FT_LOAD_NO_SCALE ) &&
2082 size->root.metrics.y_ppem < 24 )
2083 glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
2084
2085 return error;
2086 }
2087
2088
2089 /* END */
Open USB/SMB/HDD Game Loader for PS2/PS3