zenilib: zenilib/jni/external/freetype2/src/truetype/ttgload.c Source File

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ttgload.c
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1 /***************************************************************************/
2 /* */
3 /* ttgload.c */
4 /* */
5 /* TrueType Glyph Loader (body). */
6 /* */
7 /* Copyright 1996-2012 */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
9 /* */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
15 /* */
16 /***************************************************************************/
17
18
19 #include <ft2build.h>
20 #include FT_INTERNAL_DEBUG_H
21 #include FT_INTERNAL_CALC_H
22 #include FT_INTERNAL_STREAM_H
23 #include FT_INTERNAL_SFNT_H
24 #include FT_TRUETYPE_TAGS_H
25 #include FT_OUTLINE_H
26
27 #include "ttgload.h"
28 #include "ttpload.h"
29
30 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
31 #include "ttgxvar.h"
32 #endif
33
34 #include "tterrors.h"
35
36
37 /*************************************************************************/
38 /* */
39 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
40 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
41 /* messages during execution. */
42 /* */
43 #undef FT_COMPONENT
44 #define FT_COMPONENT trace_ttgload
45
46
47 /*************************************************************************/
48 /* */
49 /* Composite glyph flags. */
50 /* */
51 #define ARGS_ARE_WORDS 0x0001
52 #define ARGS_ARE_XY_VALUES 0x0002
53 #define ROUND_XY_TO_GRID 0x0004
54 #define WE_HAVE_A_SCALE 0x0008
55 /* reserved 0x0010 */
56 #define MORE_COMPONENTS 0x0020
57 #define WE_HAVE_AN_XY_SCALE 0x0040
58 #define WE_HAVE_A_2X2 0x0080
59 #define WE_HAVE_INSTR 0x0100
60 #define USE_MY_METRICS 0x0200
61 #define OVERLAP_COMPOUND 0x0400
62 #define SCALED_COMPONENT_OFFSET 0x0800
63 #define UNSCALED_COMPONENT_OFFSET 0x1000
64
65
66 /*************************************************************************/
67 /* */
68 /* Return the horizontal metrics in font units for a given glyph. */
69 /* */
70 FT_LOCAL_DEF( void )
71 TT_Get_HMetrics( TT_Face face,
72 FT_UInt idx,
73 FT_Short* lsb,
74 FT_UShort* aw )
75 {
76 ( (SFNT_Service)face->sfnt )->get_metrics( face, 0, idx, lsb, aw );
77
78 FT_TRACE5(( " advance width (font units): %d\n", *aw ));
79 FT_TRACE5(( " left side bearing (font units): %d\n", *lsb ));
80 }
81
82
83 /*************************************************************************/
84 /* */
85 /* Return the vertical metrics in font units for a given glyph. */
86 /* Greg Hitchcock from Microsoft told us that if there were no `vmtx' */
87 /* table, typoAscender/Descender from the `OS/2' table would be used */
88 /* instead, and if there were no `OS/2' table, use ascender/descender */
89 /* from the `hhea' table. But that is not what Microsoft's rasterizer */
90 /* apparently does: It uses the ppem value as the advance height, and */
91 /* sets the top side bearing to be zero. */
92 /* */
93 FT_LOCAL_DEF( void )
94 TT_Get_VMetrics( TT_Face face,
95 FT_UInt idx,
96 FT_Short* tsb,
97 FT_UShort* ah )
98 {
99 if ( face->vertical_info )
100 ( (SFNT_Service)face->sfnt )->get_metrics( face, 1, idx, tsb, ah );
101
102 #if 1 /* Empirically determined, at variance with what MS said */
103
104 else
105 {
106 *tsb = 0;
107 *ah = face->root.units_per_EM;
108 }
109
110 #else /* This is what MS said to do. It isn't what they do, however. */
111
112 else if ( face->os2.version != 0xFFFFU )
113 {
114 *tsb = face->os2.sTypoAscender;
115 *ah = face->os2.sTypoAscender - face->os2.sTypoDescender;
116 }
117 else
118 {
119 *tsb = face->horizontal.Ascender;
120 *ah = face->horizontal.Ascender - face->horizontal.Descender;
121 }
122
123 #endif
124
125 FT_TRACE5(( " advance height (font units): %d\n", *ah ));
126 FT_TRACE5(( " top side bearing (font units): %d\n", *tsb ));
127 }
128
129
130 static void
131 tt_get_metrics( TT_Loader loader,
132 FT_UInt glyph_index )
133 {
134 TT_Face face = (TT_Face)loader->face;
135
136 FT_Short left_bearing = 0, top_bearing = 0;
137 FT_UShort advance_width = 0, advance_height = 0;
138
139
140 TT_Get_HMetrics( face, glyph_index,
141 &left_bearing,
142 &advance_width );
143 TT_Get_VMetrics( face, glyph_index,
144 &top_bearing,
145 &advance_height );
146
147 loader->left_bearing = left_bearing;
148 loader->advance = advance_width;
149 loader->top_bearing = top_bearing;
150 loader->vadvance = advance_height;
151
152 if ( !loader->linear_def )
153 {
154 loader->linear_def = 1;
155 loader->linear = advance_width;
156 }
157 }
158
159
160 #ifdef FT_CONFIG_OPTION_INCREMENTAL
161
162 static void
163 tt_get_metrics_incr_overrides( TT_Loader loader,
164 FT_UInt glyph_index )
165 {
166 TT_Face face = (TT_Face)loader->face;
167
168 FT_Short left_bearing = 0, top_bearing = 0;
169 FT_UShort advance_width = 0, advance_height = 0;
170
171
172 /* If this is an incrementally loaded font check whether there are */
173 /* overriding metrics for this glyph. */
174 if ( face->root.internal->incremental_interface &&
175 face->root.internal->incremental_interface->funcs->get_glyph_metrics )
176 {
177 FT_Incremental_MetricsRec metrics;
178 FT_Error error;
179
180
181 metrics.bearing_x = loader->left_bearing;
182 metrics.bearing_y = 0;
183 metrics.advance = loader->advance;
184 metrics.advance_v = 0;
185
186 error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
187 face->root.internal->incremental_interface->object,
188 glyph_index, FALSE, &metrics );
189 if ( error )
190 goto Exit;
191
192 left_bearing = (FT_Short)metrics.bearing_x;
193 advance_width = (FT_UShort)metrics.advance;
194
195 #if 0
196
197 /* GWW: Do I do the same for vertical metrics? */
198 metrics.bearing_x = 0;
199 metrics.bearing_y = loader->top_bearing;
200 metrics.advance = loader->vadvance;
201
202 error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
203 face->root.internal->incremental_interface->object,
204 glyph_index, TRUE, &metrics );
205 if ( error )
206 goto Exit;
207
208 top_bearing = (FT_Short)metrics.bearing_y;
209 advance_height = (FT_UShort)metrics.advance;
210
211 #endif /* 0 */
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 Exit:
226 return;
227 }
228
229 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
230
231
232 /*************************************************************************/
233 /* */
234 /* Translates an array of coordinates. */
235 /* */
236 static void
237 translate_array( FT_UInt n,
238 FT_Vector* coords,
239 FT_Pos delta_x,
240 FT_Pos delta_y )
241 {
242 FT_UInt k;
243
244
245 if ( delta_x )
246 for ( k = 0; k < n; k++ )
247 coords[k].x += delta_x;
248
249 if ( delta_y )
250 for ( k = 0; k < n; k++ )
251 coords[k].y += delta_y;
252 }
253
254
255 #undef IS_HINTED
256 #define IS_HINTED( flags ) ( ( flags & FT_LOAD_NO_HINTING ) == 0 )
257
258
259 /*************************************************************************/
260 /* */
261 /* The following functions are used by default with TrueType fonts. */
262 /* However, they can be replaced by alternatives if we need to support */
263 /* TrueType-compressed formats (like MicroType) in the future. */
264 /* */
265 /*************************************************************************/
266
267 FT_CALLBACK_DEF( FT_Error )
268 TT_Access_Glyph_Frame( TT_Loader loader,
269 FT_UInt glyph_index,
270 FT_ULong offset,
271 FT_UInt byte_count )
272 {
273 FT_Error error;
274 FT_Stream stream = loader->stream;
275
276 /* for non-debug mode */
277 FT_UNUSED( glyph_index );
278
279
280 FT_TRACE4(( "Glyph %ld\n", glyph_index ));
281
282 /* the following line sets the `error' variable through macros! */
283 if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )
284 return error;
285
286 loader->cursor = stream->cursor;
287 loader->limit = stream->limit;
288
289 return TT_Err_Ok;
290 }
291
292
293 FT_CALLBACK_DEF( void )
294 TT_Forget_Glyph_Frame( TT_Loader loader )
295 {
296 FT_Stream stream = loader->stream;
297
298
299 FT_FRAME_EXIT();
300 }
301
302
303 FT_CALLBACK_DEF( FT_Error )
304 TT_Load_Glyph_Header( TT_Loader loader )
305 {
306 FT_Byte* p = loader->cursor;
307 FT_Byte* limit = loader->limit;
308
309
310 if ( p + 10 > limit )
311 return TT_Err_Invalid_Outline;
312
313 loader->n_contours = FT_NEXT_SHORT( p );
314
315 loader->bbox.xMin = FT_NEXT_SHORT( p );
316 loader->bbox.yMin = FT_NEXT_SHORT( p );
317 loader->bbox.xMax = FT_NEXT_SHORT( p );
318 loader->bbox.yMax = FT_NEXT_SHORT( p );
319
320 FT_TRACE5(( " # of contours: %d\n", loader->n_contours ));
321 FT_TRACE5(( " xMin: %4d xMax: %4d\n", loader->bbox.xMin,
322 loader->bbox.xMax ));
323 FT_TRACE5(( " yMin: %4d yMax: %4d\n", loader->bbox.yMin,
324 loader->bbox.yMax ));
325 loader->cursor = p;
326
327 return TT_Err_Ok;
328 }
329
330
331 FT_CALLBACK_DEF( FT_Error )
332 TT_Load_Simple_Glyph( TT_Loader load )
333 {
334 FT_Error error;
335 FT_Byte* p = load->cursor;
336 FT_Byte* limit = load->limit;
337 FT_GlyphLoader gloader = load->gloader;
338 FT_Int n_contours = load->n_contours;
339 FT_Outline* outline;
340 TT_Face face = (TT_Face)load->face;
341 FT_UShort n_ins;
342 FT_Int n_points;
343
344 FT_Byte *flag, *flag_limit;
345 FT_Byte c, count;
346 FT_Vector *vec, *vec_limit;
347 FT_Pos x;
348 FT_Short *cont, *cont_limit, prev_cont;
349 FT_Int xy_size = 0;
350
351
352 /* check that we can add the contours to the glyph */
353 error = FT_GLYPHLOADER_CHECK_POINTS( gloader, 0, n_contours );
354 if ( error )
355 goto Fail;
356
357 /* reading the contours' endpoints & number of points */
358 cont = gloader->current.outline.contours;
359 cont_limit = cont + n_contours;
360
361 /* check space for contours array + instructions count */
362 if ( n_contours >= 0xFFF || p + ( n_contours + 1 ) * 2 > limit )
363 goto Invalid_Outline;
364
365 prev_cont = FT_NEXT_SHORT( p );
366
367 if ( n_contours > 0 )
368 cont[0] = prev_cont;
369
370 if ( prev_cont < 0 )
371 goto Invalid_Outline;
372
373 for ( cont++; cont < cont_limit; cont++ )
374 {
375 cont[0] = FT_NEXT_SHORT( p );
376 if ( cont[0] <= prev_cont )
377 {
378 /* unordered contours: this is invalid */
379 goto Invalid_Outline;
380 }
381 prev_cont = cont[0];
382 }
383
384 n_points = 0;
385 if ( n_contours > 0 )
386 {
387 n_points = cont[-1] + 1;
388 if ( n_points < 0 )
389 goto Invalid_Outline;
390 }
391
392 /* note that we will add four phantom points later */
393 error = FT_GLYPHLOADER_CHECK_POINTS( gloader, n_points + 4, 0 );
394 if ( error )
395 goto Fail;
396
397 /* reading the bytecode instructions */
398 load->glyph->control_len = 0;
399 load->glyph->control_data = 0;
400
401 if ( p + 2 > limit )
402 goto Invalid_Outline;
403
404 n_ins = FT_NEXT_USHORT( p );
405
406 FT_TRACE5(( " Instructions size: %u\n", n_ins ));
407
408 if ( n_ins > face->max_profile.maxSizeOfInstructions )
409 {
410 FT_TRACE0(( "TT_Load_Simple_Glyph: too many instructions (%d)\n",
411 n_ins ));
412 error = TT_Err_Too_Many_Hints;
413 goto Fail;
414 }
415
416 if ( ( limit - p ) < n_ins )
417 {
418 FT_TRACE0(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));
419 error = TT_Err_Too_Many_Hints;
420 goto Fail;
421 }
422
423 #ifdef TT_USE_BYTECODE_INTERPRETER
424
425 if ( IS_HINTED( load->load_flags ) )
426 {
427 load->glyph->control_len = n_ins;
428 load->glyph->control_data = load->exec->glyphIns;
429
430 FT_MEM_COPY( load->exec->glyphIns, p, (FT_Long)n_ins );
431 }
432
433 #endif /* TT_USE_BYTECODE_INTERPRETER */
434
435 p += n_ins;
436
437 outline = &gloader->current.outline;
438
439 /* reading the point tags */
440 flag = (FT_Byte*)outline->tags;
441 flag_limit = flag + n_points;
442
443 FT_ASSERT( flag != NULL );
444
445 while ( flag < flag_limit )
446 {
447 if ( p + 1 > limit )
448 goto Invalid_Outline;
449
450 *flag++ = c = FT_NEXT_BYTE( p );
451 if ( c & 8 )
452 {
453 if ( p + 1 > limit )
454 goto Invalid_Outline;
455
456 count = FT_NEXT_BYTE( p );
457 if ( flag + (FT_Int)count > flag_limit )
458 goto Invalid_Outline;
459
460 for ( ; count > 0; count-- )
461 *flag++ = c;
462 }
463 }
464
465 /* reading the X coordinates */
466
467 vec = outline->points;
468 vec_limit = vec + n_points;
469 flag = (FT_Byte*)outline->tags;
470 x = 0;
471
472 if ( p + xy_size > limit )
473 goto Invalid_Outline;
474
475 for ( ; vec < vec_limit; vec++, flag++ )
476 {
477 FT_Pos y = 0;
478 FT_Byte f = *flag;
479
480
481 if ( f & 2 )
482 {
483 if ( p + 1 > limit )
484 goto Invalid_Outline;
485
486 y = (FT_Pos)FT_NEXT_BYTE( p );
487 if ( ( f & 16 ) == 0 )
488 y = -y;
489 }
490 else if ( ( f & 16 ) == 0 )
491 {
492 if ( p + 2 > limit )
493 goto Invalid_Outline;
494
495 y = (FT_Pos)FT_NEXT_SHORT( p );
496 }
497
498 x += y;
499 vec->x = x;
500 /* the cast is for stupid compilers */
501 *flag = (FT_Byte)( f & ~( 2 | 16 ) );
502 }
503
504 /* reading the Y coordinates */
505
506 vec = gloader->current.outline.points;
507 vec_limit = vec + n_points;
508 flag = (FT_Byte*)outline->tags;
509 x = 0;
510
511 for ( ; vec < vec_limit; vec++, flag++ )
512 {
513 FT_Pos y = 0;
514 FT_Byte f = *flag;
515
516
517 if ( f & 4 )
518 {
519 if ( p + 1 > limit )
520 goto Invalid_Outline;
521
522 y = (FT_Pos)FT_NEXT_BYTE( p );
523 if ( ( f & 32 ) == 0 )
524 y = -y;
525 }
526 else if ( ( f & 32 ) == 0 )
527 {
528 if ( p + 2 > limit )
529 goto Invalid_Outline;
530
531 y = (FT_Pos)FT_NEXT_SHORT( p );
532 }
533
534 x += y;
535 vec->y = x;
536 /* the cast is for stupid compilers */
537 *flag = (FT_Byte)( f & FT_CURVE_TAG_ON );
538 }
539
540 outline->n_points = (FT_UShort)n_points;
541 outline->n_contours = (FT_Short) n_contours;
542
543 load->cursor = p;
544
545 Fail:
546 return error;
547
548 Invalid_Outline:
549 error = TT_Err_Invalid_Outline;
550 goto Fail;
551 }
552
553
554 FT_CALLBACK_DEF( FT_Error )
555 TT_Load_Composite_Glyph( TT_Loader loader )
556 {
557 FT_Error error;
558 FT_Byte* p = loader->cursor;
559 FT_Byte* limit = loader->limit;
560 FT_GlyphLoader gloader = loader->gloader;
561 FT_SubGlyph subglyph;
562 FT_UInt num_subglyphs;
563
564
565 num_subglyphs = 0;
566
567 do
568 {
569 FT_Fixed xx, xy, yy, yx;
570 FT_UInt count;
571
572
573 /* check that we can load a new subglyph */
574 error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs + 1 );
575 if ( error )
576 goto Fail;
577
578 /* check space */
579 if ( p + 4 > limit )
580 goto Invalid_Composite;
581
582 subglyph = gloader->current.subglyphs + num_subglyphs;
583
584 subglyph->arg1 = subglyph->arg2 = 0;
585
586 subglyph->flags = FT_NEXT_USHORT( p );
587 subglyph->index = FT_NEXT_USHORT( p );
588
589 /* check space */
590 count = 2;
591 if ( subglyph->flags & ARGS_ARE_WORDS )
592 count += 2;
593 if ( subglyph->flags & WE_HAVE_A_SCALE )
594 count += 2;
595 else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
596 count += 4;
597 else if ( subglyph->flags & WE_HAVE_A_2X2 )
598 count += 8;
599
600 if ( p + count > limit )
601 goto Invalid_Composite;
602
603 /* read arguments */
604 if ( subglyph->flags & ARGS_ARE_WORDS )
605 {
606 subglyph->arg1 = FT_NEXT_SHORT( p );
607 subglyph->arg2 = FT_NEXT_SHORT( p );
608 }
609 else
610 {
611 subglyph->arg1 = FT_NEXT_CHAR( p );
612 subglyph->arg2 = FT_NEXT_CHAR( p );
613 }
614
615 /* read transform */
616 xx = yy = 0x10000L;
617 xy = yx = 0;
618
619 if ( subglyph->flags & WE_HAVE_A_SCALE )
620 {
621 xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
622 yy = xx;
623 }
624 else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
625 {
626 xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
627 yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
628 }
629 else if ( subglyph->flags & WE_HAVE_A_2X2 )
630 {
631 xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
632 yx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
633 xy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
634 yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
635 }
636
637 subglyph->transform.xx = xx;
638 subglyph->transform.xy = xy;
639 subglyph->transform.yx = yx;
640 subglyph->transform.yy = yy;
641
642 num_subglyphs++;
643
644 } while ( subglyph->flags & MORE_COMPONENTS );
645
646 gloader->current.num_subglyphs = num_subglyphs;
647
648 #ifdef TT_USE_BYTECODE_INTERPRETER
649
650 {
651 FT_Stream stream = loader->stream;
652
653
654 /* we must undo the FT_FRAME_ENTER in order to point */
655 /* to the composite instructions, if we find some. */
656 /* We will process them later. */
657 /* */
658 loader->ins_pos = (FT_ULong)( FT_STREAM_POS() +
659 p - limit );
660 }
661
662 #endif
663
664 loader->cursor = p;
665
666 Fail:
667 return error;
668
669 Invalid_Composite:
670 error = TT_Err_Invalid_Composite;
671 goto Fail;
672 }
673
674
675 FT_LOCAL_DEF( void )
676 TT_Init_Glyph_Loading( TT_Face face )
677 {
678 face->access_glyph_frame = TT_Access_Glyph_Frame;
679 face->read_glyph_header = TT_Load_Glyph_Header;
680 face->read_simple_glyph = TT_Load_Simple_Glyph;
681 face->read_composite_glyph = TT_Load_Composite_Glyph;
682 face->forget_glyph_frame = TT_Forget_Glyph_Frame;
683 }
684
685
686 static void
687 tt_prepare_zone( TT_GlyphZone zone,
688 FT_GlyphLoad load,
689 FT_UInt start_point,
690 FT_UInt start_contour )
691 {
692 zone->n_points = (FT_UShort)( load->outline.n_points - start_point );
693 zone->n_contours = (FT_Short) ( load->outline.n_contours -
694 start_contour );
695 zone->org = load->extra_points + start_point;
696 zone->cur = load->outline.points + start_point;
697 zone->orus = load->extra_points2 + start_point;
698 zone->tags = (FT_Byte*)load->outline.tags + start_point;
699 zone->contours = (FT_UShort*)load->outline.contours + start_contour;
700 zone->first_point = (FT_UShort)start_point;
701 }
702
703
704 /*************************************************************************/
705 /* */
706 /* <Function> */
707 /* TT_Hint_Glyph */
708 /* */
709 /* <Description> */
710 /* Hint the glyph using the zone prepared by the caller. Note that */
711 /* the zone is supposed to include four phantom points. */
712 /* */
713 static FT_Error
714 TT_Hint_Glyph( TT_Loader loader,
715 FT_Bool is_composite )
716 {
717 TT_GlyphZone zone = &loader->zone;
718 FT_Pos origin;
719
720 #ifdef TT_USE_BYTECODE_INTERPRETER
721 FT_UInt n_ins;
722 #else
723 FT_UNUSED( is_composite );
724 #endif
725
726
727 #ifdef TT_USE_BYTECODE_INTERPRETER
728 if ( loader->glyph->control_len > 0xFFFFL )
729 {
730 FT_TRACE1(( "TT_Hint_Glyph: too long instructions " ));
731 FT_TRACE1(( "(0x%lx byte) is truncated\n",
732 loader->glyph->control_len ));
733 }
734 n_ins = (FT_UInt)( loader->glyph->control_len );
735 #endif
736
737 origin = zone->cur[zone->n_points - 4].x;
738 origin = FT_PIX_ROUND( origin ) - origin;
739 if ( origin )
740 translate_array( zone->n_points, zone->cur, origin, 0 );
741
742 #ifdef TT_USE_BYTECODE_INTERPRETER
743 /* save original point position in org */
744 if ( n_ins > 0 )
745 FT_ARRAY_COPY( zone->org, zone->cur, zone->n_points );
746
747 /* Reset graphics state. */
748 loader->exec->GS = ((TT_Size)loader->size)->GS;
749
750 /* XXX: UNDOCUMENTED! Hinting instructions of a composite glyph */
751 /* completely refer to the (already) hinted subglyphs. */
752 if ( is_composite )
753 {
754 loader->exec->metrics.x_scale = 1 << 16;
755 loader->exec->metrics.y_scale = 1 << 16;
756
757 FT_ARRAY_COPY( zone->orus, zone->cur, zone->n_points );
758 }
759 else
760 {
761 loader->exec->metrics.x_scale =
762 ((TT_Size)loader->size)->metrics.x_scale;
763 loader->exec->metrics.y_scale =
764 ((TT_Size)loader->size)->metrics.y_scale;
765 }
766 #endif
767
768 /* round pp2 and pp4 */
769 zone->cur[zone->n_points - 3].x =
770 FT_PIX_ROUND( zone->cur[zone->n_points - 3].x );
771 zone->cur[zone->n_points - 1].y =
772 FT_PIX_ROUND( zone->cur[zone->n_points - 1].y );
773
774 #ifdef TT_USE_BYTECODE_INTERPRETER
775
776 if ( n_ins > 0 )
777 {
778 FT_Bool debug;
779 FT_Error error;
780
781 FT_GlyphLoader gloader = loader->gloader;
782 FT_Outline current_outline = gloader->current.outline;
783
784
785 error = TT_Set_CodeRange( loader->exec, tt_coderange_glyph,
786 loader->exec->glyphIns, n_ins );
787 if ( error )
788 return error;
789
790 loader->exec->is_composite = is_composite;
791 loader->exec->pts = *zone;
792
793 debug = FT_BOOL( !( loader->load_flags & FT_LOAD_NO_SCALE ) &&
794 ((TT_Size)loader->size)->debug );
795
796 error = TT_Run_Context( loader->exec, debug );
797 if ( error && loader->exec->pedantic_hinting )
798 return error;
799
800 /* store drop-out mode in bits 5-7; set bit 2 also as a marker */
801 current_outline.tags[0] |=
802 ( loader->exec->GS.scan_type << 5 ) | FT_CURVE_TAG_HAS_SCANMODE;
803 }
804
805 #endif
806
807 /* save glyph phantom points */
808 if ( !loader->preserve_pps )
809 {
810 loader->pp1 = zone->cur[zone->n_points - 4];
811 loader->pp2 = zone->cur[zone->n_points - 3];
812 loader->pp3 = zone->cur[zone->n_points - 2];
813 loader->pp4 = zone->cur[zone->n_points - 1];
814 }
815
816 return TT_Err_Ok;
817 }
818
819
820 /*************************************************************************/
821 /* */
822 /* <Function> */
823 /* TT_Process_Simple_Glyph */
824 /* */
825 /* <Description> */
826 /* Once a simple glyph has been loaded, it needs to be processed. */
827 /* Usually, this means scaling and hinting through bytecode */
828 /* interpretation. */
829 /* */
830 static FT_Error
831 TT_Process_Simple_Glyph( TT_Loader loader )
832 {
833 FT_GlyphLoader gloader = loader->gloader;
834 FT_Error error = TT_Err_Ok;
835 FT_Outline* outline;
836 FT_Int n_points;
837
838
839 outline = &gloader->current.outline;
840 n_points = outline->n_points;
841
842 /* set phantom points */
843
844 outline->points[n_points ] = loader->pp1;
845 outline->points[n_points + 1] = loader->pp2;
846 outline->points[n_points + 2] = loader->pp3;
847 outline->points[n_points + 3] = loader->pp4;
848
849 outline->tags[n_points ] = 0;
850 outline->tags[n_points + 1] = 0;
851 outline->tags[n_points + 2] = 0;
852 outline->tags[n_points + 3] = 0;
853
854 n_points += 4;
855
856 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
857
858 if ( ((TT_Face)loader->face)->doblend )
859 {
860 /* Deltas apply to the unscaled data. */
861 FT_Vector* deltas;
862 FT_Memory memory = loader->face->memory;
863 FT_Int i;
864
865
866 error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
867 loader->glyph_index,
868 &deltas,
869 n_points );
870 if ( error )
871 return error;
872
873 for ( i = 0; i < n_points; ++i )
874 {
875 outline->points[i].x += deltas[i].x;
876 outline->points[i].y += deltas[i].y;
877 }
878
879 FT_FREE( deltas );
880 }
881
882 #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
883
884 if ( IS_HINTED( loader->load_flags ) )
885 {
886 tt_prepare_zone( &loader->zone, &gloader->current, 0, 0 );
887
888 FT_ARRAY_COPY( loader->zone.orus, loader->zone.cur,
889 loader->zone.n_points + 4 );
890 }
891
892 /* scale the glyph */
893 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
894 {
895 FT_Vector* vec = outline->points;
896 FT_Vector* limit = outline->points + n_points;
897 FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
898 FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
899
900
901 for ( ; vec < limit; vec++ )
902 {
903 vec->x = FT_MulFix( vec->x, x_scale );
904 vec->y = FT_MulFix( vec->y, y_scale );
905 }
906
907 loader->pp1 = outline->points[n_points - 4];
908 loader->pp2 = outline->points[n_points - 3];
909 loader->pp3 = outline->points[n_points - 2];
910 loader->pp4 = outline->points[n_points - 1];
911 }
912
913 if ( IS_HINTED( loader->load_flags ) )
914 {
915 loader->zone.n_points += 4;
916
917 error = TT_Hint_Glyph( loader, 0 );
918 }
919
920 return error;
921 }
922
923
924 /*************************************************************************/
925 /* */
926 /* <Function> */
927 /* TT_Process_Composite_Component */
928 /* */
929 /* <Description> */
930 /* Once a composite component has been loaded, it needs to be */
931 /* processed. Usually, this means transforming and translating. */
932 /* */
933 static FT_Error
934 TT_Process_Composite_Component( TT_Loader loader,
935 FT_SubGlyph subglyph,
936 FT_UInt start_point,
937 FT_UInt num_base_points )
938 {
939 FT_GlyphLoader gloader = loader->gloader;
940 FT_Vector* base_vec = gloader->base.outline.points;
941 FT_UInt num_points = gloader->base.outline.n_points;
942 FT_Bool have_scale;
943 FT_Pos x, y;
944
945
946 have_scale = FT_BOOL( subglyph->flags & ( WE_HAVE_A_SCALE |
947 WE_HAVE_AN_XY_SCALE |
948 WE_HAVE_A_2X2 ) );
949
950 /* perform the transform required for this subglyph */
951 if ( have_scale )
952 {
953 FT_UInt i;
954
955
956 for ( i = num_base_points; i < num_points; i++ )
957 FT_Vector_Transform( base_vec + i, &subglyph->transform );
958 }
959
960 /* get offset */
961 if ( !( subglyph->flags & ARGS_ARE_XY_VALUES ) )
962 {
963 FT_UInt k = subglyph->arg1;
964 FT_UInt l = subglyph->arg2;
965 FT_Vector* p1;
966 FT_Vector* p2;
967
968
969 /* match l-th point of the newly loaded component to the k-th point */
970 /* of the previously loaded components. */
971
972 /* change to the point numbers used by our outline */
973 k += start_point;
974 l += num_base_points;
975 if ( k >= num_base_points ||
976 l >= num_points )
977 return TT_Err_Invalid_Composite;
978
979 p1 = gloader->base.outline.points + k;
980 p2 = gloader->base.outline.points + l;
981
982 x = p1->x - p2->x;
983 y = p1->y - p2->y;
984 }
985 else
986 {
987 x = subglyph->arg1;
988 y = subglyph->arg2;
989
990 if ( !x && !y )
991 return TT_Err_Ok;
992
993 /* Use a default value dependent on */
994 /* TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED. This is useful for old TT */
995 /* fonts which don't set the xxx_COMPONENT_OFFSET bit. */
996
997 if ( have_scale &&
998 #ifdef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
999 !( subglyph->flags & UNSCALED_COMPONENT_OFFSET ) )
1000 #else
1001 ( subglyph->flags & SCALED_COMPONENT_OFFSET ) )
1002 #endif
1003 {
1004
1005 #if 0
1006
1007 /*************************************************************************/
1008 /* */
1009 /* This algorithm is what Apple documents. But it doesn't work. */
1010 /* */
1011 int a = subglyph->transform.xx > 0 ? subglyph->transform.xx
1012 : -subglyph->transform.xx;
1013 int b = subglyph->transform.yx > 0 ? subglyph->transform.yx
1014 : -subglyph->transform.yx;
1015 int c = subglyph->transform.xy > 0 ? subglyph->transform.xy
1016 : -subglyph->transform.xy;
1017 int d = subglyph->transform.yy > 0 ? subglyph->transform.yy
1018 : -subglyph->transform.yy;
1019 int m = a > b ? a : b;
1020 int n = c > d ? c : d;
1021
1022
1023 if ( a - b <= 33 && a - b >= -33 )
1024 m *= 2;
1025 if ( c - d <= 33 && c - d >= -33 )
1026 n *= 2;
1027 x = FT_MulFix( x, m );
1028 y = FT_MulFix( y, n );
1029
1030 #else /* 0 */
1031
1032 /*************************************************************************/
1033 /* */
1034 /* This algorithm is a guess and works much better than the above. */
1035 /* */
1036 FT_Fixed mac_xscale = FT_SqrtFixed(
1037 (FT_Int32)FT_MulFix( subglyph->transform.xx,
1038 subglyph->transform.xx ) +
1039 (FT_Int32)FT_MulFix( subglyph->transform.xy,
1040 subglyph->transform.xy ) );
1041 FT_Fixed mac_yscale = FT_SqrtFixed(
1042 (FT_Int32)FT_MulFix( subglyph->transform.yy,
1043 subglyph->transform.yy ) +
1044 (FT_Int32)FT_MulFix( subglyph->transform.yx,
1045 subglyph->transform.yx ) );
1046
1047
1048 x = FT_MulFix( x, mac_xscale );
1049 y = FT_MulFix( y, mac_yscale );
1050
1051 #endif /* 0 */
1052
1053 }
1054
1055 if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
1056 {
1057 FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
1058 FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
1059
1060
1061 x = FT_MulFix( x, x_scale );
1062 y = FT_MulFix( y, y_scale );
1063
1064 if ( subglyph->flags & ROUND_XY_TO_GRID )
1065 {
1066 x = FT_PIX_ROUND( x );
1067 y = FT_PIX_ROUND( y );
1068 }
1069 }
1070 }
1071
1072 if ( x || y )
1073 translate_array( num_points - num_base_points,
1074 base_vec + num_base_points,
1075 x, y );
1076
1077 return TT_Err_Ok;
1078 }
1079
1080
1081 /*************************************************************************/
1082 /* */
1083 /* <Function> */
1084 /* TT_Process_Composite_Glyph */
1085 /* */
1086 /* <Description> */
1087 /* This is slightly different from TT_Process_Simple_Glyph, in that */
1088 /* its sole purpose is to hint the glyph. Thus this function is */
1089 /* only available when bytecode interpreter is enabled. */
1090 /* */
1091 static FT_Error
1092 TT_Process_Composite_Glyph( TT_Loader loader,
1093 FT_UInt start_point,
1094 FT_UInt start_contour )
1095 {
1096 FT_Error error;
1097 FT_Outline* outline;
1098 FT_UInt i;
1099
1100
1101 outline = &loader->gloader->base.outline;
1102
1103 /* make room for phantom points */
1104 error = FT_GLYPHLOADER_CHECK_POINTS( loader->gloader,
1105 outline->n_points + 4,
1106 0 );
1107 if ( error )
1108 return error;
1109
1110 outline->points[outline->n_points ] = loader->pp1;
1111 outline->points[outline->n_points + 1] = loader->pp2;
1112 outline->points[outline->n_points + 2] = loader->pp3;
1113 outline->points[outline->n_points + 3] = loader->pp4;
1114
1115 outline->tags[outline->n_points ] = 0;
1116 outline->tags[outline->n_points + 1] = 0;
1117 outline->tags[outline->n_points + 2] = 0;
1118 outline->tags[outline->n_points + 3] = 0;
1119
1120 #ifdef TT_USE_BYTECODE_INTERPRETER
1121
1122 {
1123 FT_Stream stream = loader->stream;
1124 FT_UShort n_ins, max_ins;
1125 FT_ULong tmp;
1126
1127
1128 /* TT_Load_Composite_Glyph only gives us the offset of instructions */
1129 /* so we read them here */
1130 if ( FT_STREAM_SEEK( loader->ins_pos ) ||
1131 FT_READ_USHORT( n_ins ) )
1132 return error;
1133
1134 FT_TRACE5(( " Instructions size = %d\n", n_ins ));
1135
1136 /* check it */
1137 max_ins = ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions;
1138 if ( n_ins > max_ins )
1139 {
1140 /* acroread ignores this field, so we only do a rough safety check */
1141 if ( (FT_Int)n_ins > loader->byte_len )
1142 {
1143 FT_TRACE1(( "TT_Process_Composite_Glyph: "
1144 "too many instructions (%d) for glyph with length %d\n",
1145 n_ins, loader->byte_len ));
1146 return TT_Err_Too_Many_Hints;
1147 }
1148
1149 tmp = loader->exec->glyphSize;
1150 error = Update_Max( loader->exec->memory,
1151 &tmp,
1152 sizeof ( FT_Byte ),
1153 (void*)&loader->exec->glyphIns,
1154 n_ins );
1155 loader->exec->glyphSize = (FT_UShort)tmp;
1156 if ( error )
1157 return error;
1158 }
1159 else if ( n_ins == 0 )
1160 return TT_Err_Ok;
1161
1162 if ( FT_STREAM_READ( loader->exec->glyphIns, n_ins ) )
1163 return error;
1164
1165 loader->glyph->control_data = loader->exec->glyphIns;
1166 loader->glyph->control_len = n_ins;
1167 }
1168
1169 #endif
1170
1171 tt_prepare_zone( &loader->zone, &loader->gloader->base,
1172 start_point, start_contour );
1173
1174 /* Some points are likely touched during execution of */
1175 /* instructions on components. So let's untouch them. */
1176 for ( i = start_point; i < loader->zone.n_points; i++ )
1177 loader->zone.tags[i] &= ~FT_CURVE_TAG_TOUCH_BOTH;
1178
1179 loader->zone.n_points += 4;
1180
1181 return TT_Hint_Glyph( loader, 1 );
1182 }
1183
1184
1185 /* Calculate the four phantom points. */
1186 /* The first two stand for horizontal origin and advance. */
1187 /* The last two stand for vertical origin and advance. */
1188 #define TT_LOADER_SET_PP( loader ) \
1189 do { \
1190 (loader)->pp1.x = (loader)->bbox.xMin - (loader)->left_bearing; \
1191 (loader)->pp1.y = 0; \
1192 (loader)->pp2.x = (loader)->pp1.x + (loader)->advance; \
1193 (loader)->pp2.y = 0; \
1194 (loader)->pp3.x = 0; \
1195 (loader)->pp3.y = (loader)->top_bearing + (loader)->bbox.yMax; \
1196 (loader)->pp4.x = 0; \
1197 (loader)->pp4.y = (loader)->pp3.y - (loader)->vadvance; \
1198 } while ( 0 )
1199
1200
1201 /*************************************************************************/
1202 /* */
1203 /* <Function> */
1204 /* load_truetype_glyph */
1205 /* */
1206 /* <Description> */
1207 /* Loads a given truetype glyph. Handles composites and uses a */
1208 /* TT_Loader object. */
1209 /* */
1210 static FT_Error
1211 load_truetype_glyph( TT_Loader loader,
1212 FT_UInt glyph_index,
1213 FT_UInt recurse_count,
1214 FT_Bool header_only )
1215 {
1216 FT_Error error = TT_Err_Ok;
1217 FT_Fixed x_scale, y_scale;
1218 FT_ULong offset;
1219 TT_Face face = (TT_Face)loader->face;
1220 FT_GlyphLoader gloader = loader->gloader;
1221 FT_Bool opened_frame = 0;
1222
1223 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1224 FT_Vector* deltas = NULL;
1225 #endif
1226
1227 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1228 FT_StreamRec inc_stream;
1229 FT_Data glyph_data;
1230 FT_Bool glyph_data_loaded = 0;
1231 #endif
1232
1233
1234 /* some fonts have an incorrect value of `maxComponentDepth', */
1235 /* thus we allow depth 1 to catch the majority of them */
1236 if ( recurse_count > 1 &&
1237 recurse_count > face->max_profile.maxComponentDepth )
1238 {
1239 error = TT_Err_Invalid_Composite;
1240 goto Exit;
1241 }
1242
1243 /* check glyph index */
1244 if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
1245 {
1246 error = TT_Err_Invalid_Glyph_Index;
1247 goto Exit;
1248 }
1249
1250 loader->glyph_index = glyph_index;
1251
1252 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1253 {
1254 x_scale = ((TT_Size)loader->size)->metrics.x_scale;
1255 y_scale = ((TT_Size)loader->size)->metrics.y_scale;
1256 }
1257 else
1258 {
1259 x_scale = 0x10000L;
1260 y_scale = 0x10000L;
1261 }
1262
1263 tt_get_metrics( loader, glyph_index );
1264
1265 /* Set `offset' to the start of the glyph relative to the start of */
1266 /* the `glyf' table, and `byte_len' to the length of the glyph in */
1267 /* bytes. */
1268
1269 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1270
1271 /* If we are loading glyph data via the incremental interface, set */
1272 /* the loader stream to a memory stream reading the data returned */
1273 /* by the interface. */
1274 if ( face->root.internal->incremental_interface )
1275 {
1276 error = face->root.internal->incremental_interface->funcs->get_glyph_data(
1277 face->root.internal->incremental_interface->object,
1278 glyph_index, &glyph_data );
1279 if ( error )
1280 goto Exit;
1281
1282 glyph_data_loaded = 1;
1283 offset = 0;
1284 loader->byte_len = glyph_data.length;
1285
1286 FT_MEM_ZERO( &inc_stream, sizeof ( inc_stream ) );
1287 FT_Stream_OpenMemory( &inc_stream,
1288 glyph_data.pointer, glyph_data.length );
1289
1290 loader->stream = &inc_stream;
1291 }
1292 else
1293
1294 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
1295
1296 offset = tt_face_get_location( face, glyph_index,
1297 (FT_UInt*)&loader->byte_len );
1298
1299 if ( loader->byte_len > 0 )
1300 {
1301 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1302 /* for the incremental interface, `glyf_offset' is always zero */
1303 if ( !loader->glyf_offset &&
1304 !face->root.internal->incremental_interface )
1305 #else
1306 if ( !loader->glyf_offset )
1307 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
1308 {
1309 FT_TRACE2(( "no `glyf' table but non-zero `loca' entry\n" ));
1310 error = TT_Err_Invalid_Table;
1311 goto Exit;
1312 }
1313
1314 error = face->access_glyph_frame( loader, glyph_index,
1315 loader->glyf_offset + offset,
1316 loader->byte_len );
1317 if ( error )
1318 goto Exit;
1319
1320 opened_frame = 1;
1321
1322 /* read glyph header first */
1323 error = face->read_glyph_header( loader );
1324 if ( error || header_only )
1325 goto Exit;
1326 }
1327
1328 if ( loader->byte_len == 0 || loader->n_contours == 0 )
1329 {
1330 loader->bbox.xMin = 0;
1331 loader->bbox.xMax = 0;
1332 loader->bbox.yMin = 0;
1333 loader->bbox.yMax = 0;
1334
1335 if ( header_only )
1336 goto Exit;
1337
1338 /* must initialize points before (possibly) overriding */
1339 /* glyph metrics from the incremental interface */
1340 TT_LOADER_SET_PP( loader );
1341
1342 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1343 tt_get_metrics_incr_overrides( loader, glyph_index );
1344 #endif
1345
1346 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1347
1348 if ( ((TT_Face)(loader->face))->doblend )
1349 {
1350 /* this must be done before scaling */
1351 FT_Memory memory = loader->face->memory;
1352
1353
1354 error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
1355 glyph_index, &deltas, 4 );
1356 if ( error )
1357 goto Exit;
1358
1359 loader->pp1.x += deltas[0].x; loader->pp1.y += deltas[0].y;
1360 loader->pp2.x += deltas[1].x; loader->pp2.y += deltas[1].y;
1361 loader->pp3.x += deltas[2].x; loader->pp3.y += deltas[2].y;
1362 loader->pp4.x += deltas[3].x; loader->pp4.y += deltas[3].y;
1363
1364 FT_FREE( deltas );
1365 }
1366
1367 #endif
1368
1369 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1370 {
1371 loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
1372 loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
1373 loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );
1374 loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );
1375 }
1376
1377 error = TT_Err_Ok;
1378 goto Exit;
1379 }
1380
1381 /* must initialize points before (possibly) overriding */
1382 /* glyph metrics from the incremental interface */
1383 TT_LOADER_SET_PP( loader );
1384
1385 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1386 tt_get_metrics_incr_overrides( loader, glyph_index );
1387 #endif
1388
1389 /***********************************************************************/
1390 /***********************************************************************/
1391 /***********************************************************************/
1392
1393 /* if it is a simple glyph, load it */
1394
1395 if ( loader->n_contours > 0 )
1396 {
1397 error = face->read_simple_glyph( loader );
1398 if ( error )
1399 goto Exit;
1400
1401 /* all data have been read */
1402 face->forget_glyph_frame( loader );
1403 opened_frame = 0;
1404
1405 error = TT_Process_Simple_Glyph( loader );
1406 if ( error )
1407 goto Exit;
1408
1409 FT_GlyphLoader_Add( gloader );
1410 }
1411
1412 /***********************************************************************/
1413 /***********************************************************************/
1414 /***********************************************************************/
1415
1416 /* otherwise, load a composite! */
1417 else if ( loader->n_contours == -1 )
1418 {
1419 FT_UInt start_point;
1420 FT_UInt start_contour;
1421 FT_ULong ins_pos; /* position of composite instructions, if any */
1422
1423
1424 start_point = gloader->base.outline.n_points;
1425 start_contour = gloader->base.outline.n_contours;
1426
1427 /* for each subglyph, read composite header */
1428 error = face->read_composite_glyph( loader );
1429 if ( error )
1430 goto Exit;
1431
1432 /* store the offset of instructions */
1433 ins_pos = loader->ins_pos;
1434
1435 /* all data we need are read */
1436 face->forget_glyph_frame( loader );
1437 opened_frame = 0;
1438
1439 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1440
1441 if ( face->doblend )
1442 {
1443 FT_Int i, limit;
1444 FT_SubGlyph subglyph;
1445 FT_Memory memory = face->root.memory;
1446
1447
1448 /* this provides additional offsets */
1449 /* for each component's translation */
1450
1451 if ( ( error = TT_Vary_Get_Glyph_Deltas(
1452 face,
1453 glyph_index,
1454 &deltas,
1455 gloader->current.num_subglyphs + 4 )) != 0 )
1456 goto Exit;
1457
1458 subglyph = gloader->current.subglyphs + gloader->base.num_subglyphs;
1459 limit = gloader->current.num_subglyphs;
1460
1461 for ( i = 0; i < limit; ++i, ++subglyph )
1462 {
1463 if ( subglyph->flags & ARGS_ARE_XY_VALUES )
1464 {
1465 /* XXX: overflow check for subglyph->{arg1,arg2}. */
1466 /* deltas[i].{x,y} must be within signed 16-bit, */
1467 /* but the restriction of summed delta is not clear */
1468 subglyph->arg1 += (FT_Int16)deltas[i].x;
1469 subglyph->arg2 += (FT_Int16)deltas[i].y;
1470 }
1471 }
1472
1473 loader->pp1.x += deltas[i + 0].x; loader->pp1.y += deltas[i + 0].y;
1474 loader->pp2.x += deltas[i + 1].x; loader->pp2.y += deltas[i + 1].y;
1475 loader->pp3.x += deltas[i + 2].x; loader->pp3.y += deltas[i + 2].y;
1476 loader->pp4.x += deltas[i + 3].x; loader->pp4.y += deltas[i + 3].y;
1477
1478 FT_FREE( deltas );
1479 }
1480
1481 #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
1482
1483 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1484 {
1485 loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
1486 loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
1487 loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );
1488 loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );
1489 }
1490
1491 /* if the flag FT_LOAD_NO_RECURSE is set, we return the subglyph */
1492 /* `as is' in the glyph slot (the client application will be */
1493 /* responsible for interpreting these data)... */
1494 if ( loader->load_flags & FT_LOAD_NO_RECURSE )
1495 {
1496 FT_GlyphLoader_Add( gloader );
1497 loader->glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
1498
1499 goto Exit;
1500 }
1501
1502 /*********************************************************************/
1503 /*********************************************************************/
1504 /*********************************************************************/
1505
1506 {
1507 FT_UInt n, num_base_points;
1508 FT_SubGlyph subglyph = 0;
1509
1510 FT_UInt num_points = start_point;
1511 FT_UInt num_subglyphs = gloader->current.num_subglyphs;
1512 FT_UInt num_base_subgs = gloader->base.num_subglyphs;
1513
1514 FT_Stream old_stream = loader->stream;
1515 FT_Int old_byte_len = loader->byte_len;
1516
1517
1518 FT_GlyphLoader_Add( gloader );
1519
1520 /* read each subglyph independently */
1521 for ( n = 0; n < num_subglyphs; n++ )
1522 {
1523 FT_Vector pp[4];
1524
1525
1526 /* Each time we call load_truetype_glyph in this loop, the */
1527 /* value of `gloader.base.subglyphs' can change due to table */
1528 /* reallocations. We thus need to recompute the subglyph */
1529 /* pointer on each iteration. */
1530 subglyph = gloader->base.subglyphs + num_base_subgs + n;
1531
1532 pp[0] = loader->pp1;
1533 pp[1] = loader->pp2;
1534 pp[2] = loader->pp3;
1535 pp[3] = loader->pp4;
1536
1537 num_base_points = gloader->base.outline.n_points;
1538
1539 error = load_truetype_glyph( loader, subglyph->index,
1540 recurse_count + 1, FALSE );
1541 if ( error )
1542 goto Exit;
1543
1544 /* restore subglyph pointer */
1545 subglyph = gloader->base.subglyphs + num_base_subgs + n;
1546
1547 if ( !( subglyph->flags & USE_MY_METRICS ) )
1548 {
1549 loader->pp1 = pp[0];
1550 loader->pp2 = pp[1];
1551 loader->pp3 = pp[2];
1552 loader->pp4 = pp[3];
1553 }
1554
1555 num_points = gloader->base.outline.n_points;
1556
1557 if ( num_points == num_base_points )
1558 continue;
1559
1560 /* gloader->base.outline consists of three parts: */
1561 /* 0 -(1)-> start_point -(2)-> num_base_points -(3)-> n_points. */
1562 /* */
1563 /* (1): exists from the beginning */
1564 /* (2): components that have been loaded so far */
1565 /* (3): the newly loaded component */
1566 TT_Process_Composite_Component( loader, subglyph, start_point,
1567 num_base_points );
1568 }
1569
1570 loader->stream = old_stream;
1571 loader->byte_len = old_byte_len;
1572
1573 /* process the glyph */
1574 loader->ins_pos = ins_pos;
1575 if ( IS_HINTED( loader->load_flags ) &&
1576
1577 #ifdef TT_USE_BYTECODE_INTERPRETER
1578
1579 subglyph->flags & WE_HAVE_INSTR &&
1580
1581 #endif
1582
1583 num_points > start_point )
1584 TT_Process_Composite_Glyph( loader, start_point, start_contour );
1585
1586 }
1587 }
1588 else
1589 {
1590 /* invalid composite count (negative but not -1) */
1591 error = TT_Err_Invalid_Outline;
1592 goto Exit;
1593 }
1594
1595 /***********************************************************************/
1596 /***********************************************************************/
1597 /***********************************************************************/
1598
1599 Exit:
1600
1601 if ( opened_frame )
1602 face->forget_glyph_frame( loader );
1603
1604 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1605
1606 if ( glyph_data_loaded )
1607 face->root.internal->incremental_interface->funcs->free_glyph_data(
1608 face->root.internal->incremental_interface->object,
1609 &glyph_data );
1610
1611 #endif
1612
1613 return error;
1614 }
1615
1616
1617 static FT_Error
1618 compute_glyph_metrics( TT_Loader loader,
1619 FT_UInt glyph_index )
1620 {
1621 FT_BBox bbox;
1622 TT_Face face = (TT_Face)loader->face;
1623 FT_Fixed y_scale;
1624 TT_GlyphSlot glyph = loader->glyph;
1625 TT_Size size = (TT_Size)loader->size;
1626
1627
1628 y_scale = 0x10000L;
1629 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
1630 y_scale = size->root.metrics.y_scale;
1631
1632 if ( glyph->format != FT_GLYPH_FORMAT_COMPOSITE )
1633 FT_Outline_Get_CBox( &glyph->outline, &bbox );
1634 else
1635 bbox = loader->bbox;
1636
1637 /* get the device-independent horizontal advance; it is scaled later */
1638 /* by the base layer. */
1639 glyph->linearHoriAdvance = loader->linear;
1640
1641 glyph->metrics.horiBearingX = bbox.xMin;
1642 glyph->metrics.horiBearingY = bbox.yMax;
1643 glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
1644
1645 /* adjust advance width to the value contained in the hdmx table */
1646 if ( !face->postscript.isFixedPitch &&
1647 IS_HINTED( loader->load_flags ) )
1648 {
1649 FT_Byte* widthp;
1650
1651
1652 widthp = tt_face_get_device_metrics( face,
1653 size->root.metrics.x_ppem,
1654 glyph_index );
1655
1656 if ( widthp )
1657 glyph->metrics.horiAdvance = *widthp << 6;
1658 }
1659
1660 /* set glyph dimensions */
1661 glyph->metrics.width = bbox.xMax - bbox.xMin;
1662 glyph->metrics.height = bbox.yMax - bbox.yMin;
1663
1664 /* Now take care of vertical metrics. In the case where there is */
1665 /* no vertical information within the font (relatively common), */
1666 /* create some metrics manually */
1667 {
1668 FT_Pos top; /* scaled vertical top side bearing */
1669 FT_Pos advance; /* scaled vertical advance height */
1670
1671
1672 /* Get the unscaled top bearing and advance height. */
1673 if ( face->vertical_info &&
1674 face->vertical.number_Of_VMetrics > 0 )
1675 {
1676 top = (FT_Short)FT_DivFix( loader->pp3.y - bbox.yMax,
1677 y_scale );
1678
1679 if ( loader->pp3.y <= loader->pp4.y )
1680 advance = 0;
1681 else
1682 advance = (FT_UShort)FT_DivFix( loader->pp3.y - loader->pp4.y,
1683 y_scale );
1684 }
1685 else
1686 {
1687 FT_Pos height;
1688
1689
1690 /* XXX Compute top side bearing and advance height in */
1691 /* Get_VMetrics instead of here. */
1692
1693 /* NOTE: The OS/2 values are the only `portable' ones, */
1694 /* which is why we use them, if there is an OS/2 */
1695 /* table in the font. Otherwise, we use the */
1696 /* values defined in the horizontal header. */
1697
1698 height = (FT_Short)FT_DivFix( bbox.yMax - bbox.yMin,
1699 y_scale );
1700 if ( face->os2.version != 0xFFFFU )
1701 advance = (FT_Pos)( face->os2.sTypoAscender -
1702 face->os2.sTypoDescender );
1703 else
1704 advance = (FT_Pos)( face->horizontal.Ascender -
1705 face->horizontal.Descender );
1706
1707 top = ( advance - height ) / 2;
1708 }
1709
1710 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1711 {
1712 FT_Incremental_InterfaceRec* incr;
1713 FT_Incremental_MetricsRec metrics;
1714 FT_Error error;
1715
1716
1717 incr = face->root.internal->incremental_interface;
1718
1719 /* If this is an incrementally loaded font see if there are */
1720 /* overriding metrics for this glyph. */
1721 if ( incr && incr->funcs->get_glyph_metrics )
1722 {
1723 metrics.bearing_x = 0;
1724 metrics.bearing_y = top;
1725 metrics.advance = advance;
1726
1727 error = incr->funcs->get_glyph_metrics( incr->object,
1728 glyph_index,
1729 TRUE,
1730 &metrics );
1731 if ( error )
1732 return error;
1733
1734 top = metrics.bearing_y;
1735 advance = metrics.advance;
1736 }
1737 }
1738
1739 /* GWW: Do vertical metrics get loaded incrementally too? */
1740
1741 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
1742
1743 glyph->linearVertAdvance = advance;
1744
1745 /* scale the metrics */
1746 if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
1747 {
1748 top = FT_MulFix( top, y_scale );
1749 advance = FT_MulFix( advance, y_scale );
1750 }
1751
1752 /* XXX: for now, we have no better algorithm for the lsb, but it */
1753 /* should work fine. */
1754 /* */
1755 glyph->metrics.vertBearingX = glyph->metrics.horiBearingX -
1756 glyph->metrics.horiAdvance / 2;
1757 glyph->metrics.vertBearingY = top;
1758 glyph->metrics.vertAdvance = advance;
1759 }
1760
1761 return 0;
1762 }
1763
1764
1765 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
1766
1767 static FT_Error
1768 load_sbit_image( TT_Size size,
1769 TT_GlyphSlot glyph,
1770 FT_UInt glyph_index,
1771 FT_Int32 load_flags )
1772 {
1773 TT_Face face;
1774 SFNT_Service sfnt;
1775 FT_Stream stream;
1776 FT_Error error;
1777 TT_SBit_MetricsRec metrics;
1778
1779
1780 face = (TT_Face)glyph->face;
1781 sfnt = (SFNT_Service)face->sfnt;
1782 stream = face->root.stream;
1783
1784 error = sfnt->load_sbit_image( face,
1785 size->strike_index,
1786 glyph_index,
1787 (FT_Int)load_flags,
1788 stream,
1789 &glyph->bitmap,
1790 &metrics );
1791 if ( !error )
1792 {
1793 glyph->outline.n_points = 0;
1794 glyph->outline.n_contours = 0;
1795
1796 glyph->metrics.width = (FT_Pos)metrics.width << 6;
1797 glyph->metrics.height = (FT_Pos)metrics.height << 6;
1798
1799 glyph->metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6;
1800 glyph->metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6;
1801 glyph->metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6;
1802
1803 glyph->metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6;
1804 glyph->metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6;
1805 glyph->metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6;
1806
1807 glyph->format = FT_GLYPH_FORMAT_BITMAP;
1808
1809 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
1810 {
1811 glyph->bitmap_left = metrics.vertBearingX;
1812 glyph->bitmap_top = metrics.vertBearingY;
1813 }
1814 else
1815 {
1816 glyph->bitmap_left = metrics.horiBearingX;
1817 glyph->bitmap_top = metrics.horiBearingY;
1818 }
1819 }
1820
1821 return error;
1822 }
1823
1824 #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
1825
1826
1827 static FT_Error
1828 tt_loader_init( TT_Loader loader,
1829 TT_Size size,
1830 TT_GlyphSlot glyph,
1831 FT_Int32 load_flags,
1832 FT_Bool glyf_table_only )
1833 {
1834 TT_Face face;
1835 FT_Stream stream;
1836 FT_Bool pedantic = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );
1837
1838
1839 face = (TT_Face)glyph->face;
1840 stream = face->root.stream;
1841
1842 FT_MEM_ZERO( loader, sizeof ( TT_LoaderRec ) );
1843
1844 #ifdef TT_USE_BYTECODE_INTERPRETER
1845
1846 /* load execution context */
1847 if ( IS_HINTED( load_flags ) && !glyf_table_only )
1848 {
1849 TT_ExecContext exec;
1850 FT_Bool grayscale;
1851
1852
1853 if ( !size->cvt_ready )
1854 {
1855 FT_Error error = tt_size_ready_bytecode( size, pedantic );
1856
1857
1858 if ( error )
1859 return error;
1860 }
1861
1862 /* query new execution context */
1863 exec = size->debug ? size->context
1864 : ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
1865 if ( !exec )
1866 return TT_Err_Could_Not_Find_Context;
1867
1868 grayscale =
1869 FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) != FT_RENDER_MODE_MONO );
1870
1871 TT_Load_Context( exec, face, size );
1872
1873 /* a change from mono to grayscale rendering (and vice versa) */
1874 /* requires a re-execution of the CVT program */
1875 if ( grayscale != exec->grayscale )
1876 {
1877 FT_UInt i;
1878
1879
1880 FT_TRACE4(( "tt_loader_init: grayscale change,"
1881 " re-executing `prep' table\n" ));
1882
1883 exec->grayscale = grayscale;
1884
1885 for ( i = 0; i < size->cvt_size; i++ )
1886 size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
1887 tt_size_run_prep( size, pedantic );
1888 }
1889
1890 /* see whether the cvt program has disabled hinting */
1891 if ( exec->GS.instruct_control & 1 )
1892 load_flags |= FT_LOAD_NO_HINTING;
1893
1894 /* load default graphics state -- if needed */
1895 if ( exec->GS.instruct_control & 2 )
1896 exec->GS = tt_default_graphics_state;
1897
1898 exec->pedantic_hinting = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );
1899 loader->exec = exec;
1900 loader->instructions = exec->glyphIns;
1901 }
1902
1903 #endif /* TT_USE_BYTECODE_INTERPRETER */
1904
1905 /* seek to the beginning of the glyph table -- for Type 42 fonts */
1906 /* the table might be accessed from a Postscript stream or something */
1907 /* else... */
1908
1909 #ifdef FT_CONFIG_OPTION_INCREMENTAL
1910
1911 if ( face->root.internal->incremental_interface )
1912 loader->glyf_offset = 0;
1913 else
1914
1915 #endif
1916
1917 {
1918 FT_Error error = face->goto_table( face, TTAG_glyf, stream, 0 );
1919
1920
1921 if ( error == TT_Err_Table_Missing )
1922 loader->glyf_offset = 0;
1923 else if ( error )
1924 {
1925 FT_ERROR(( "tt_loader_init: could not access glyph table\n" ));
1926 return error;
1927 }
1928 else
1929 loader->glyf_offset = FT_STREAM_POS();
1930 }
1931
1932 /* get face's glyph loader */
1933 if ( !glyf_table_only )
1934 {
1935 FT_GlyphLoader gloader = glyph->internal->loader;
1936
1937
1938 FT_GlyphLoader_Rewind( gloader );
1939 loader->gloader = gloader;
1940 }
1941
1942 loader->load_flags = load_flags;
1943
1944 loader->face = (FT_Face)face;
1945 loader->size = (FT_Size)size;
1946 loader->glyph = (FT_GlyphSlot)glyph;
1947 loader->stream = stream;
1948
1949 return TT_Err_Ok;
1950 }
1951
1952
1953 /*************************************************************************/
1954 /* */
1955 /* <Function> */
1956 /* TT_Load_Glyph */
1957 /* */
1958 /* <Description> */
1959 /* A function used to load a single glyph within a given glyph slot, */
1960 /* for a given size. */
1961 /* */
1962 /* <Input> */
1963 /* glyph :: A handle to a target slot object where the glyph */
1964 /* will be loaded. */
1965 /* */
1966 /* size :: A handle to the source face size at which the glyph */
1967 /* must be scaled/loaded. */
1968 /* */
1969 /* glyph_index :: The index of the glyph in the font file. */
1970 /* */
1971 /* load_flags :: A flag indicating what to load for this glyph. The */
1972 /* FT_LOAD_XXX constants can be used to control the */
1973 /* glyph loading process (e.g., whether the outline */
1974 /* should be scaled, whether to load bitmaps or not, */
1975 /* whether to hint the outline, etc). */
1976 /* */
1977 /* <Return> */
1978 /* FreeType error code. 0 means success. */
1979 /* */
1980 FT_LOCAL_DEF( FT_Error )
1981 TT_Load_Glyph( TT_Size size,
1982 TT_GlyphSlot glyph,
1983 FT_UInt glyph_index,
1984 FT_Int32 load_flags )
1985 {
1986 TT_Face face;
1987 FT_Error error;
1988 TT_LoaderRec loader;
1989
1990
1991 face = (TT_Face)glyph->face;
1992 error = TT_Err_Ok;
1993
1994 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
1995
1996 /* try to load embedded bitmap if any */
1997 /* */
1998 /* XXX: The convention should be emphasized in */
1999 /* the documents because it can be confusing. */
2000 if ( size->strike_index != 0xFFFFFFFFUL &&
2001 ( load_flags & FT_LOAD_NO_BITMAP ) == 0 )
2002 {
2003 error = load_sbit_image( size, glyph, glyph_index, load_flags );
2004 if ( !error )
2005 {
2006 FT_Face root = &face->root;
2007
2008
2009 if ( FT_IS_SCALABLE( root ) )
2010 {
2011 /* for the bbox we need the header only */
2012 (void)tt_loader_init( &loader, size, glyph, load_flags, TRUE );
2013 (void)load_truetype_glyph( &loader, glyph_index, 0, TRUE );
2014 glyph->linearHoriAdvance = loader.linear;
2015 glyph->linearVertAdvance = loader.top_bearing + loader.bbox.yMax -
2016 loader.vadvance;
2017 }
2018
2019 return TT_Err_Ok;
2020 }
2021 }
2022
2023 #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
2024
2025 /* if FT_LOAD_NO_SCALE is not set, `ttmetrics' must be valid */
2026 if ( !( load_flags & FT_LOAD_NO_SCALE ) && !size->ttmetrics.valid )
2027 return TT_Err_Invalid_Size_Handle;
2028
2029 if ( load_flags & FT_LOAD_SBITS_ONLY )
2030 return TT_Err_Invalid_Argument;
2031
2032 error = tt_loader_init( &loader, size, glyph, load_flags, FALSE );
2033 if ( error )
2034 return error;
2035
2036 glyph->format = FT_GLYPH_FORMAT_OUTLINE;
2037 glyph->num_subglyphs = 0;
2038 glyph->outline.flags = 0;
2039
2040 /* main loading loop */
2041 error = load_truetype_glyph( &loader, glyph_index, 0, FALSE );
2042 if ( !error )
2043 {
2044 if ( glyph->format == FT_GLYPH_FORMAT_COMPOSITE )
2045 {
2046 glyph->num_subglyphs = loader.gloader->base.num_subglyphs;
2047 glyph->subglyphs = loader.gloader->base.subglyphs;
2048 }
2049 else
2050 {
2051 glyph->outline = loader.gloader->base.outline;
2052 glyph->outline.flags &= ~FT_OUTLINE_SINGLE_PASS;
2053
2054 /* Translate array so that (0,0) is the glyph's origin. Note */
2055 /* that this behaviour is independent on the value of bit 1 of */
2056 /* the `flags' field in the `head' table -- at least major */
2057 /* applications like Acroread indicate that. */
2058 if ( loader.pp1.x )
2059 FT_Outline_Translate( &glyph->outline, -loader.pp1.x, 0 );
2060 }
2061
2062 #ifdef TT_USE_BYTECODE_INTERPRETER
2063
2064 if ( IS_HINTED( load_flags ) )
2065 {
2066 if ( loader.exec->GS.scan_control )
2067 {
2068 /* convert scan conversion mode to FT_OUTLINE_XXX flags */
2069 switch ( loader.exec->GS.scan_type )
2070 {
2071 case 0: /* simple drop-outs including stubs */
2072 glyph->outline.flags |= FT_OUTLINE_INCLUDE_STUBS;
2073 break;
2074 case 1: /* simple drop-outs excluding stubs */
2075 /* nothing; it's the default rendering mode */
2076 break;
2077 case 4: /* smart drop-outs including stubs */
2078 glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS |
2079 FT_OUTLINE_INCLUDE_STUBS;
2080 break;
2081 case 5: /* smart drop-outs excluding stubs */
2082 glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS;
2083 break;
2084
2085 default: /* no drop-out control */
2086 glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
2087 break;
2088 }
2089 }
2090 else
2091 glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
2092 }
2093
2094 #endif /* TT_USE_BYTECODE_INTERPRETER */
2095
2096 compute_glyph_metrics( &loader, glyph_index );
2097 }
2098
2099 /* Set the `high precision' bit flag. */
2100 /* This is _critical_ to get correct output for monochrome */
2101 /* TrueType glyphs at all sizes using the bytecode interpreter. */
2102 /* */
2103 if ( !( load_flags & FT_LOAD_NO_SCALE ) &&
2104 size->root.metrics.y_ppem < 24 )
2105 glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
2106
2107 return error;
2108 }
2109
2110
2111 /* END */
TT_FaceRec_::forget_glyph_frame
TT_Loader_EndGlyphFunc forget_glyph_frame
Definition: tttypes.h:1291
FT_RENDER_MODE_MONO
Definition: freetype.h:2713
UNSCALED_COMPONENT_OFFSET
#define UNSCALED_COMPONENT_OFFSET
Definition: ttgload.c:63
tt_default_graphics_state
const TT_GraphicsState tt_default_graphics_state
TT_GlyphZoneRec_::n_points
FT_UShort n_points
Definition: tttypes.h:1470
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TT_Load_Glyph_Header(TT_Loader loader)
Definition: ttgload.c:304
FT_OUTLINE_SINGLE_PASS
#define FT_OUTLINE_SINGLE_PASS
Definition: ftimage.h:483
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FT_Byte * tags
Definition: tttypes.h:1477
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int FT_Error
Definition: fttypes.h:296
FT_Incremental_MetricsRec_::bearing_y
FT_Long bearing_y
Definition: ftincrem.h:118
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FT_Vector pp4
Definition: tttypes.h:1529
TT_GraphicsState_::instruct_control
FT_Byte instruct_control
Definition: ttobjs.h:101
FT_LOAD_VERTICAL_LAYOUT
#define FT_LOAD_VERTICAL_LAYOUT
Definition: freetype.h:2516
FT_DivFix
FT_DivFix(FT_Long a, FT_Long b)
Definition: ftcalc.c:536
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void * sfnt
Definition: tttypes.h:1298
FT_Long
signed long FT_Long
Definition: fttypes.h:238
SFNT_Service
SFNT_Interface * SFNT_Service
Definition: sfnt.h:754
TT_LoaderRec_::exec
TT_ExecContext exec
Definition: tttypes.h:1518
TT_FaceRec_::os2
TT_OS2 os2
Definition: tttypes.h:1282
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FT_GlyphSlot glyph
Definition: tttypes.h:1493
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unsigned long FT_ULong
Definition: fttypes.h:249
TT_Postscript_::isFixedPitch
FT_ULong isFixedPitch
Definition: tttables.h:420
TT_ExecContextRec_::glyphSize
FT_UInt glyphSize
Definition: ttinterp.h:157
FT_LOAD_SBITS_ONLY
#define FT_LOAD_SBITS_ONLY
Definition: freetype.h:2531
TT_GlyphZoneRec_::org
FT_Vector * org
Definition: tttypes.h:1473
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FT_BEGIN_HEADER typedef signed long FT_Pos
Definition: ftimage.h:59
FT_GlyphSlotRec_
Definition: freetype.h:1605
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#define TT_CONFIG_OPTION_EMBEDDED_BITMAPS
Definition: ftoption.h:490
FT_Incremental_InterfaceRec_
Definition: ftincrem.h:314
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#define TTAG_glyf
Definition: tttags.h:58
void
GLvoid **typedef void(GLAPIENTRY *PFNGLGETVERTEXATTRIBDVPROC)(GLuint
Definition: glew.h:1824
TT_OS2_::version
FT_UShort version
Definition: tttables.h:352
FT_SubGlyphRec_
Definition: ftgloadr.h:57
TT_CONFIG_OPTION_GX_VAR_SUPPORT
#define TT_CONFIG_OPTION_GX_VAR_SUPPORT
Definition: ftoption.h:650
TT_SBit_MetricsRec_::horiBearingY
FT_Char horiBearingY
Definition: tttypes.h:441
ttpload.h
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Definition: ttgload.c:56
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#define WE_HAVE_AN_XY_SCALE
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Definition: ftconfig.h:165
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Definition: ftdebug.h:159
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static FT_Error TT_Process_Composite_Component(TT_Loader loader, FT_SubGlyph subglyph, FT_UInt start_point, FT_UInt num_base_points)
Definition: ttgload.c:934
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Definition: tttables.h:542
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Definition: glew.h:13816
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const FT_Incremental_FuncsRec * funcs
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Definition: glew.h:8383
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Definition: tttypes.h:435
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Definition: ttgload.c:831
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static FT_Error load_truetype_glyph(TT_Loader loader, FT_UInt glyph_index, FT_UInt recurse_count, FT_Bool header_only)
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Definition: ttgload.c:1188
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FT_Glyph_Metrics metrics
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FT_Outline_Translate(const FT_Outline *outline, FT_Pos xOffset, FT_Pos yOffset)
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FT_Bool scan_control
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#define WE_HAVE_A_SCALE
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Definition: glslang_tab.cpp:1907
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int i
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Definition: ttinterp.h:158
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#define FT_MEM_COPY(dest, source, count)
Definition: ftmemory.h:203
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#define FT_NEXT_SHORT(buffer)
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TT_Access_Glyph_Frame(TT_Loader loader, FT_UInt glyph_index, FT_ULong offset, FT_UInt byte_count)
Definition: ttgload.c:268
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#define FT_GLYPHLOADER_CHECK_POINTS(_loader, _points, _contours)
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static FT_Error tt_loader_init(TT_Loader loader, TT_Size size, TT_GlyphSlot glyph, FT_Int32 load_flags, FT_Bool glyf_table_only)
Definition: ttgload.c:1828
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FT_Pos yMin
Definition: ftimage.h:118
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FT_Vector * extra_points2
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#define FT_STREAM_READ(buffer, count)
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#define FT_UNUSED(arg)
Definition: ftconfig.h:101
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#define TRUE
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struct TT_SizeRec_ * TT_Size
Definition: ttobjs.h:50
FT_PIX_ROUND
#define FT_PIX_ROUND(x)
Definition: ftobjs.h:81
FT_GLYPH_FORMAT_OUTLINE
FT_Module_Constructor FT_GLYPH_FORMAT_OUTLINE
Definition: ftrend1.c:283
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FT_Size_Metrics metrics
Definition: freetype.h:1399
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tt_face_get_location(TT_Face face, FT_UInt gindex, FT_UInt *asize)
Definition: ttpload.c:173
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FT_Byte vertAdvance
Definition: tttypes.h:446
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FT_Face face
Definition: tttypes.h:1491
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FT_Memory memory
Definition: freetype.h:956
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Definition: ftincrem.h:115
TT_Hint_Glyph
static FT_Error TT_Hint_Glyph(TT_Loader loader, FT_Bool is_composite)
Definition: ttgload.c:714
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#define FT_LOAD_TARGET_MODE(x)
Definition: freetype.h:2617
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GLsizei size
Definition: gl2ext.h:1467
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const GLdouble * m
Definition: glew.h:8385