1 /****************************************************************************
2 *
3 * cffgload.c
4 *
5 * OpenType Glyph Loader (body).
6 *
7 * Copyright (C) 1996-2023 by
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 <freetype/internal/ftdebug.h>
20 #include <freetype/internal/ftstream.h>
21 #include <freetype/internal/sfnt.h>
22 #include <freetype/internal/ftcalc.h>
23 #include <freetype/internal/psaux.h>
24 #include <freetype/ftoutln.h>
25 #include <freetype/ftdriver.h>
26
27 #include "cffload.h"
28 #include "cffgload.h"
29
30 #include "cfferrs.h"
31
32 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
33 #define IS_DEFAULT_INSTANCE( _face ) \
34 ( !( FT_IS_NAMED_INSTANCE( _face ) || \
35 FT_IS_VARIATION( _face ) ) )
36 #else
37 #define IS_DEFAULT_INSTANCE( _face ) 1
38 #endif
39
40
41 /**************************************************************************
42 *
43 * The macro FT_COMPONENT is used in trace mode. It is an implicit
44 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
45 * messages during execution.
46 */
47 #undef FT_COMPONENT
48 #define FT_COMPONENT cffgload
49
50
51 FT_LOCAL_DEF( FT_Error )
52 cff_get_glyph_data( TT_Face face,
53 FT_UInt glyph_index,
54 FT_Byte** pointer,
55 FT_ULong* length )
56 {
57 #ifdef FT_CONFIG_OPTION_INCREMENTAL
58 /* For incremental fonts get the character data using the */
59 /* callback function. */
60 if ( face->root.internal->incremental_interface )
61 {
62 FT_Data data;
63 FT_Error error =
64 face->root.internal->incremental_interface->funcs->get_glyph_data(
65 face->root.internal->incremental_interface->object,
66 glyph_index, &data );
67
68
69 *pointer = (FT_Byte*)data.pointer;
70 *length = data.length;
71
72 return error;
73 }
74 else
75 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
76
77 {
78 CFF_Font cff = (CFF_Font)( face->extra.data );
79
80
81 return cff_index_access_element( &cff->charstrings_index, glyph_index,
82 pointer, length );
83 }
84 }
85
86
87 FT_LOCAL_DEF( void )
88 cff_free_glyph_data( TT_Face face,
89 FT_Byte** pointer,
90 FT_ULong length )
91 {
92 #ifndef FT_CONFIG_OPTION_INCREMENTAL
93 FT_UNUSED( length );
94 #endif
95
96 #ifdef FT_CONFIG_OPTION_INCREMENTAL
97 /* For incremental fonts get the character data using the */
98 /* callback function. */
99 if ( face->root.internal->incremental_interface )
100 {
101 FT_Data data;
102
103
104 data.pointer = *pointer;
105 data.length = (FT_UInt)length;
106
107 face->root.internal->incremental_interface->funcs->free_glyph_data(
108 face->root.internal->incremental_interface->object, &data );
109 }
110 else
111 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
112
113 {
114 CFF_Font cff = (CFF_Font)( face->extra.data );
115
116
117 cff_index_forget_element( &cff->charstrings_index, pointer );
118 }
119 }
120
121
122 /*************************************************************************/
123 /*************************************************************************/
124 /*************************************************************************/
125 /********** *********/
126 /********** *********/
127 /********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/
128 /********** *********/
129 /********** The following code is in charge of computing *********/
130 /********** the maximum advance width of the font. It *********/
131 /********** quickly processes each glyph charstring to *********/
132 /********** extract the value from either a `sbw' or `seac' *********/
133 /********** operator. *********/
134 /********** *********/
135 /*************************************************************************/
136 /*************************************************************************/
137 /*************************************************************************/
138
139
140 #if 0 /* unused until we support pure CFF fonts */
141
142
143 FT_LOCAL_DEF( FT_Error )
144 cff_compute_max_advance( TT_Face face,
145 FT_Int* max_advance )
146 {
147 FT_Error error = FT_Err_Ok;
148 CFF_Decoder decoder;
149 FT_Int glyph_index;
150 CFF_Font cff = (CFF_Font)face->other;
151
152 PSAux_Service psaux = (PSAux_Service)face->psaux;
153 const CFF_Decoder_Funcs decoder_funcs = psaux->cff_decoder_funcs;
154
155
156 *max_advance = 0;
157
158 /* Initialize load decoder */
159 decoder_funcs->init( &decoder, face, 0, 0, 0, 0, 0, 0 );
160
161 decoder.builder.metrics_only = 1;
162 decoder.builder.load_points = 0;
163
164 /* For each glyph, parse the glyph charstring and extract */
165 /* the advance width. */
166 for ( glyph_index = 0; glyph_index < face->root.num_glyphs;
167 glyph_index++ )
168 {
169 FT_Byte* charstring;
170 FT_ULong charstring_len;
171
172
173 /* now get load the unscaled outline */
174 error = cff_get_glyph_data( face, glyph_index,
175 &charstring, &charstring_len );
176 if ( !error )
177 {
178 error = decoder_funcs->prepare( &decoder, size, glyph_index );
179 if ( !error )
180 error = decoder_funcs->parse_charstrings_old( &decoder,
181 charstring,
182 charstring_len,
183 0 );
184
185 cff_free_glyph_data( face, &charstring, &charstring_len );
186 }
187
188 /* ignore the error if one has occurred -- skip to next glyph */
189 error = FT_Err_Ok;
190 }
191
192 *max_advance = decoder.builder.advance.x;
193
194 return FT_Err_Ok;
195 }
196
197
198 #endif /* 0 */
199
200
201 FT_LOCAL_DEF( FT_Error )
202 cff_slot_load( CFF_GlyphSlot glyph,
203 CFF_Size size,
204 FT_UInt glyph_index,
205 FT_Int32 load_flags )
206 {
207 FT_Error error;
208 CFF_Decoder decoder;
209 PS_Decoder psdecoder;
210 TT_Face face = (TT_Face)glyph->root.face;
211 FT_Bool hinting, scaled, force_scaling;
212 CFF_Font cff = (CFF_Font)face->extra.data;
213
214 PSAux_Service psaux = (PSAux_Service)face->psaux;
215 const CFF_Decoder_Funcs decoder_funcs = psaux->cff_decoder_funcs;
216
217 FT_Matrix font_matrix;
218 FT_Vector font_offset;
219
220
221 force_scaling = FALSE;
222
223 /* in a CID-keyed font, consider `glyph_index' as a CID and map */
224 /* it immediately to the real glyph_index -- if it isn't a */
225 /* subsetted font, glyph_indices and CIDs are identical, though */
226 if ( cff->top_font.font_dict.cid_registry != 0xFFFFU &&
227 cff->charset.cids )
228 {
229 /* don't handle CID 0 (.notdef) which is directly mapped to GID 0 */
230 if ( glyph_index != 0 )
231 {
232 glyph_index = cff_charset_cid_to_gindex( &cff->charset,
233 glyph_index );
234 if ( glyph_index == 0 )
235 return FT_THROW( Invalid_Argument );
236 }
237 }
238 else if ( glyph_index >= cff->num_glyphs )
239 return FT_THROW( Invalid_Argument );
240
241 if ( load_flags & FT_LOAD_NO_RECURSE )
242 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
243
244 glyph->x_scale = 0x10000L;
245 glyph->y_scale = 0x10000L;
246 if ( size )
247 {
248 glyph->x_scale = size->root.metrics.x_scale;
249 glyph->y_scale = size->root.metrics.y_scale;
250 }
251
252 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
253
254 /* try to load embedded bitmap if any */
255 /* */
256 /* XXX: The convention should be emphasized in */
257 /* the documents because it can be confusing. */
258 if ( size )
259 {
260 CFF_Face cff_face = (CFF_Face)size->root.face;
261 SFNT_Service sfnt = (SFNT_Service)cff_face->sfnt;
262 FT_Stream stream = cff_face->root.stream;
263
264
265 if ( size->strike_index != 0xFFFFFFFFUL &&
266 ( load_flags & FT_LOAD_NO_BITMAP ) == 0 &&
267 IS_DEFAULT_INSTANCE( size->root.face ) )
268 {
269 TT_SBit_MetricsRec metrics;
270
271
272 error = sfnt->load_sbit_image( face,
273 size->strike_index,
274 glyph_index,
275 (FT_UInt)load_flags,
276 stream,
277 &glyph->root.bitmap,
278 &metrics );
279
280 if ( !error )
281 {
282 FT_Bool has_vertical_info;
283 FT_UShort advance;
284 FT_Short dummy;
285
286
287 glyph->root.outline.n_points = 0;
288 glyph->root.outline.n_contours = 0;
289
290 glyph->root.metrics.width = (FT_Pos)metrics.width * 64;
291 glyph->root.metrics.height = (FT_Pos)metrics.height * 64;
292
293 glyph->root.metrics.horiBearingX = (FT_Pos)metrics.horiBearingX * 64;
294 glyph->root.metrics.horiBearingY = (FT_Pos)metrics.horiBearingY * 64;
295 glyph->root.metrics.horiAdvance = (FT_Pos)metrics.horiAdvance * 64;
296
297 glyph->root.metrics.vertBearingX = (FT_Pos)metrics.vertBearingX * 64;
298 glyph->root.metrics.vertBearingY = (FT_Pos)metrics.vertBearingY * 64;
299 glyph->root.metrics.vertAdvance = (FT_Pos)metrics.vertAdvance * 64;
300
301 glyph->root.format = FT_GLYPH_FORMAT_BITMAP;
302
303 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
304 {
305 glyph->root.bitmap_left = metrics.vertBearingX;
306 glyph->root.bitmap_top = metrics.vertBearingY;
307 }
308 else
309 {
310 glyph->root.bitmap_left = metrics.horiBearingX;
311 glyph->root.bitmap_top = metrics.horiBearingY;
312 }
313
314 /* compute linear advance widths */
315
316 (void)( (SFNT_Service)face->sfnt )->get_metrics( face, 0,
317 glyph_index,
318 &dummy,
319 &advance );
320 glyph->root.linearHoriAdvance = advance;
321
322 has_vertical_info = FT_BOOL(
323 face->vertical_info &&
324 face->vertical.number_Of_VMetrics > 0 );
325
326 /* get the vertical metrics from the vmtx table if we have one */
327 if ( has_vertical_info )
328 {
329 (void)( (SFNT_Service)face->sfnt )->get_metrics( face, 1,
330 glyph_index,
331 &dummy,
332 &advance );
333 glyph->root.linearVertAdvance = advance;
334 }
335 else
336 {
337 /* make up vertical ones */
338 if ( face->os2.version != 0xFFFFU )
339 glyph->root.linearVertAdvance = (FT_Pos)
340 ( face->os2.sTypoAscender - face->os2.sTypoDescender );
341 else
342 glyph->root.linearVertAdvance = (FT_Pos)
343 ( face->horizontal.Ascender - face->horizontal.Descender );
344 }
345
346 return error;
347 }
348 }
349 }
350
351 #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
352
353 /* return immediately if we only want the embedded bitmaps */
354 if ( load_flags & FT_LOAD_SBITS_ONLY )
355 return FT_THROW( Invalid_Argument );
356
357 #ifdef FT_CONFIG_OPTION_SVG
358 /* check for OT-SVG */
359 if ( ( load_flags & FT_LOAD_NO_SVG ) == 0 &&
360 ( load_flags & FT_LOAD_COLOR ) &&
361 face->svg )
362 {
363 /*
364 * We load the SVG document and try to grab the advances from the
365 * table. For the bearings we rely on the presetting hook to do that.
366 */
367
368 SFNT_Service sfnt = (SFNT_Service)face->sfnt;
369
370
371 if ( size && (size->root.metrics.x_ppem < 1 ||
372 size->root.metrics.y_ppem < 1 ) )
373 {
374 error = FT_THROW( Invalid_Size_Handle );
375 return error;
376 }
377
378 FT_TRACE3(( "Trying to load SVG glyph\n" ));
379
380 error = sfnt->load_svg_doc( (FT_GlyphSlot)glyph, glyph_index );
381 if ( !error )
382 {
383 FT_Fixed x_scale = size->root.metrics.x_scale;
384 FT_Fixed y_scale = size->root.metrics.y_scale;
385
386 FT_Short dummy;
387 FT_UShort advanceX;
388 FT_UShort advanceY;
389
390
391 FT_TRACE3(( "Successfully loaded SVG glyph\n" ));
392
393 glyph->root.format = FT_GLYPH_FORMAT_SVG;
394
395 /*
396 * If horizontal or vertical advances are not present in the table,
397 * this is a problem with the font since the standard requires them.
398 * However, we are graceful and calculate the values by ourselves
399 * for the vertical case.
400 */
401 sfnt->get_metrics( face,
402 FALSE,
403 glyph_index,
404 &dummy,
405 &advanceX );
406 sfnt->get_metrics( face,
407 TRUE,
408 glyph_index,
409 &dummy,
410 &advanceY );
411
412 glyph->root.linearHoriAdvance = advanceX;
413 glyph->root.linearVertAdvance = advanceY;
414
415 glyph->root.metrics.horiAdvance = FT_MulFix( advanceX, x_scale );
416 glyph->root.metrics.vertAdvance = FT_MulFix( advanceY, y_scale );
417
418 return error;
419 }
420
421 FT_TRACE3(( "Failed to load SVG glyph\n" ));
422 }
423
424 #endif /* FT_CONFIG_OPTION_SVG */
425
426 /* if we have a CID subfont, use its matrix (which has already */
427 /* been multiplied with the root matrix) */
428
429 /* this scaling is only relevant if the PS hinter isn't active */
430 if ( cff->num_subfonts )
431 {
432 FT_Long top_upm, sub_upm;
433 FT_Byte fd_index = cff_fd_select_get( &cff->fd_select,
434 glyph_index );
435
436
437 if ( fd_index >= cff->num_subfonts )
438 fd_index = (FT_Byte)( cff->num_subfonts - 1 );
439
440 top_upm = (FT_Long)cff->top_font.font_dict.units_per_em;
441 sub_upm = (FT_Long)cff->subfonts[fd_index]->font_dict.units_per_em;
442
443 font_matrix = cff->subfonts[fd_index]->font_dict.font_matrix;
444 font_offset = cff->subfonts[fd_index]->font_dict.font_offset;
445
446 if ( top_upm != sub_upm )
447 {
448 glyph->x_scale = FT_MulDiv( glyph->x_scale, top_upm, sub_upm );
449 glyph->y_scale = FT_MulDiv( glyph->y_scale, top_upm, sub_upm );
450
451 force_scaling = TRUE;
452 }
453 }
454 else
455 {
456 font_matrix = cff->top_font.font_dict.font_matrix;
457 font_offset = cff->top_font.font_dict.font_offset;
458 }
459
460 glyph->root.outline.n_points = 0;
461 glyph->root.outline.n_contours = 0;
462
463 /* top-level code ensures that FT_LOAD_NO_HINTING is set */
464 /* if FT_LOAD_NO_SCALE is active */
465 hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
466 scaled = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 );
467
468 glyph->hint = hinting;
469 glyph->scaled = scaled;
470 glyph->root.format = FT_GLYPH_FORMAT_OUTLINE; /* by default */
471
472 {
473 #ifdef CFF_CONFIG_OPTION_OLD_ENGINE
474 PS_Driver driver = (PS_Driver)FT_FACE_DRIVER( face );
475 #endif
476
477 FT_Byte* charstring;
478 FT_ULong charstring_len;
479
480
481 decoder_funcs->init( &decoder, face, size, glyph, hinting,
482 FT_LOAD_TARGET_MODE( load_flags ),
483 cff_get_glyph_data,
484 cff_free_glyph_data );
485
486 /* this is for pure CFFs */
487 if ( load_flags & FT_LOAD_ADVANCE_ONLY )
488 decoder.width_only = TRUE;
489
490 decoder.builder.no_recurse =
491 FT_BOOL( load_flags & FT_LOAD_NO_RECURSE );
492
493 /* this function also checks for a valid subfont index */
494 error = decoder_funcs->prepare( &decoder, size, glyph_index );
495 if ( error )
496 goto Glyph_Build_Finished;
497
498 /* now load the unscaled outline */
499 error = cff_get_glyph_data( face, glyph_index,
500 &charstring, &charstring_len );
501 if ( error )
502 goto Glyph_Build_Finished;
503
504 #ifdef CFF_CONFIG_OPTION_OLD_ENGINE
505 /* choose which CFF renderer to use */
506 if ( driver->hinting_engine == FT_HINTING_FREETYPE )
507 error = decoder_funcs->parse_charstrings_old( &decoder,
508 charstring,
509 charstring_len,
510 0 );
511 else
512 #endif
513 {
514 psaux->ps_decoder_init( &psdecoder, &decoder, FALSE );
515
516 error = decoder_funcs->parse_charstrings( &psdecoder,
517 charstring,
518 charstring_len );
519
520 /* Adobe's engine uses 16.16 numbers everywhere; */
521 /* as a consequence, glyphs larger than 2000ppem get rejected */
522 if ( FT_ERR_EQ( error, Glyph_Too_Big ) )
523 {
524 /* this time, we retry unhinted and scale up the glyph later on */
525 /* (the engine uses and sets the hardcoded value 0x10000 / 64 = */
526 /* 0x400 for both `x_scale' and `y_scale' in this case) */
527 hinting = FALSE;
528 force_scaling = TRUE;
529 glyph->hint = hinting;
530
531 error = decoder_funcs->parse_charstrings( &psdecoder,
532 charstring,
533 charstring_len );
534 }
535 }
536
537 cff_free_glyph_data( face, &charstring, charstring_len );
538
539 if ( error )
540 goto Glyph_Build_Finished;
541
542 #ifdef FT_CONFIG_OPTION_INCREMENTAL
543 /* Control data and length may not be available for incremental */
544 /* fonts. */
545 if ( face->root.internal->incremental_interface )
546 {
547 glyph->root.control_data = NULL;
548 glyph->root.control_len = 0;
549 }
550 else
551 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
552
553 /* We set control_data and control_len if charstrings is loaded. */
554 /* See how charstring loads at cff_index_access_element() in */
555 /* cffload.c. */
556 {
557 CFF_Index csindex = &cff->charstrings_index;
558
559
560 if ( csindex->offsets )
561 {
562 glyph->root.control_data = csindex->bytes +
563 csindex->offsets[glyph_index] - 1;
564 glyph->root.control_len = (FT_Long)charstring_len;
565 }
566 }
567
568 Glyph_Build_Finished:
569 /* save new glyph tables, if no error */
570 if ( !error )
571 decoder.builder.funcs.done( &decoder.builder );
572 /* XXX: anything to do for broken glyph entry? */
573 }
574
575 #ifdef FT_CONFIG_OPTION_INCREMENTAL
576
577 /* Incremental fonts can optionally override the metrics. */
578 if ( !error &&
579 face->root.internal->incremental_interface &&
580 face->root.internal->incremental_interface->funcs->get_glyph_metrics )
581 {
582 FT_Incremental_MetricsRec metrics;
583
584
585 metrics.bearing_x = decoder.builder.left_bearing.x;
586 metrics.bearing_y = 0;
587 metrics.advance = decoder.builder.advance.x;
588 metrics.advance_v = decoder.builder.advance.y;
589
590 error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
591 face->root.internal->incremental_interface->object,
592 glyph_index, FALSE, &metrics );
593
594 decoder.builder.left_bearing.x = metrics.bearing_x;
595 decoder.builder.advance.x = metrics.advance;
596 decoder.builder.advance.y = metrics.advance_v;
597 }
598
599 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
600
601 if ( !error )
602 {
603 /* Now, set the metrics -- this is rather simple, as */
604 /* the left side bearing is the xMin, and the top side */
605 /* bearing the yMax. */
606
607 /* For composite glyphs, return only left side bearing and */
608 /* advance width. */
609 if ( load_flags & FT_LOAD_NO_RECURSE )
610 {
611 FT_Slot_Internal internal = glyph->root.internal;
612
613
614 glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;
615 glyph->root.metrics.horiAdvance = decoder.glyph_width;
616 internal->glyph_matrix = font_matrix;
617 internal->glyph_delta = font_offset;
618 internal->glyph_transformed = 1;
619 }
620 else
621 {
622 FT_BBox cbox;
623 FT_Glyph_Metrics* metrics = &glyph->root.metrics;
624 FT_Bool has_vertical_info;
625
626
627 if ( face->horizontal.number_Of_HMetrics )
628 {
629 FT_Short horiBearingX = 0;
630 FT_UShort horiAdvance = 0;
631
632
633 ( (SFNT_Service)face->sfnt )->get_metrics( face, 0,
634 glyph_index,
635 &horiBearingX,
636 &horiAdvance );
637 metrics->horiAdvance = horiAdvance;
638 metrics->horiBearingX = horiBearingX;
639 glyph->root.linearHoriAdvance = horiAdvance;
640 }
641 else
642 {
643 /* copy the _unscaled_ advance width */
644 metrics->horiAdvance = decoder.glyph_width;
645 glyph->root.linearHoriAdvance = decoder.glyph_width;
646 }
647
648 glyph->root.internal->glyph_transformed = 0;
649
650 has_vertical_info = FT_BOOL( face->vertical_info &&
651 face->vertical.number_Of_VMetrics > 0 );
652
653 /* get the vertical metrics from the vmtx table if we have one */
654 if ( has_vertical_info )
655 {
656 FT_Short vertBearingY = 0;
657 FT_UShort vertAdvance = 0;
658
659
660 ( (SFNT_Service)face->sfnt )->get_metrics( face, 1,
661 glyph_index,
662 &vertBearingY,
663 &vertAdvance );
664 metrics->vertBearingY = vertBearingY;
665 metrics->vertAdvance = vertAdvance;
666 }
667 else
668 {
669 /* make up vertical ones */
670 if ( face->os2.version != 0xFFFFU )
671 metrics->vertAdvance = (FT_Pos)( face->os2.sTypoAscender -
672 face->os2.sTypoDescender );
673 else
674 metrics->vertAdvance = (FT_Pos)( face->horizontal.Ascender -
675 face->horizontal.Descender );
676 }
677
678 glyph->root.linearVertAdvance = metrics->vertAdvance;
679
680 glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
681
682 glyph->root.outline.flags = 0;
683 if ( size && size->root.metrics.y_ppem < 24 )
684 glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION;
685
686 glyph->root.outline.flags |= FT_OUTLINE_REVERSE_FILL;
687
688 /* apply the font matrix, if any */
689 if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L ||
690 font_matrix.xy != 0 || font_matrix.yx != 0 )
691 {
692 FT_Outline_Transform( &glyph->root.outline, &font_matrix );
693
694 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance,
695 font_matrix.xx );
696 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance,
697 font_matrix.yy );
698 }
699
700 if ( font_offset.x || font_offset.y )
701 {
702 FT_Outline_Translate( &glyph->root.outline,
703 font_offset.x,
704 font_offset.y );
705
706 metrics->horiAdvance += font_offset.x;
707 metrics->vertAdvance += font_offset.y;
708 }
709
710 if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 || force_scaling )
711 {
712 /* scale the outline and the metrics */
713 FT_Int n;
714 FT_Outline* cur = &glyph->root.outline;
715 FT_Vector* vec = cur->points;
716 FT_Fixed x_scale = glyph->x_scale;
717 FT_Fixed y_scale = glyph->y_scale;
718
719
720 /* First of all, scale the points */
721 if ( !hinting || !decoder.builder.hints_funcs )
722 for ( n = cur->n_points; n > 0; n--, vec++ )
723 {
724 vec->x = FT_MulFix( vec->x, x_scale );
725 vec->y = FT_MulFix( vec->y, y_scale );
726 }
727
728 /* Then scale the metrics */
729 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
730 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
731 }
732
733 /* compute the other metrics */
734 FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
735
736 metrics->width = cbox.xMax - cbox.xMin;
737 metrics->height = cbox.yMax - cbox.yMin;
738
739 metrics->horiBearingX = cbox.xMin;
740 metrics->horiBearingY = cbox.yMax;
741
742 if ( has_vertical_info )
743 {
744 metrics->vertBearingX = metrics->horiBearingX -
745 metrics->horiAdvance / 2;
746 metrics->vertBearingY = FT_MulFix( metrics->vertBearingY,
747 glyph->y_scale );
748 }
749 else
750 {
751 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
752 ft_synthesize_vertical_metrics( metrics,
753 metrics->vertAdvance );
754 }
755 }
756 }
757
758 return error;
759 }
760
761
762 /* END */