|
1 /***************************************************************************/ |
|
2 /* */ |
|
3 /* pfrload.c */ |
|
4 /* */ |
|
5 /* FreeType PFR loader (body). */ |
|
6 /* */ |
|
7 /* Copyright 2002, 2003, 2004, 2005, 2007, 2009, 2010 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 "pfrload.h" |
|
20 #include FT_INTERNAL_DEBUG_H |
|
21 #include FT_INTERNAL_STREAM_H |
|
22 |
|
23 #include "pfrerror.h" |
|
24 |
|
25 #undef FT_COMPONENT |
|
26 #define FT_COMPONENT trace_pfr |
|
27 |
|
28 |
|
29 /*************************************************************************/ |
|
30 /*************************************************************************/ |
|
31 /***** *****/ |
|
32 /***** EXTRA ITEMS *****/ |
|
33 /***** *****/ |
|
34 /*************************************************************************/ |
|
35 /*************************************************************************/ |
|
36 |
|
37 |
|
38 FT_LOCAL_DEF( FT_Error ) |
|
39 pfr_extra_items_skip( FT_Byte* *pp, |
|
40 FT_Byte* limit ) |
|
41 { |
|
42 return pfr_extra_items_parse( pp, limit, NULL, NULL ); |
|
43 } |
|
44 |
|
45 |
|
46 FT_LOCAL_DEF( FT_Error ) |
|
47 pfr_extra_items_parse( FT_Byte* *pp, |
|
48 FT_Byte* limit, |
|
49 PFR_ExtraItem item_list, |
|
50 FT_Pointer item_data ) |
|
51 { |
|
52 FT_Error error = PFR_Err_Ok; |
|
53 FT_Byte* p = *pp; |
|
54 FT_UInt num_items, item_type, item_size; |
|
55 |
|
56 |
|
57 PFR_CHECK( 1 ); |
|
58 num_items = PFR_NEXT_BYTE( p ); |
|
59 |
|
60 for ( ; num_items > 0; num_items-- ) |
|
61 { |
|
62 PFR_CHECK( 2 ); |
|
63 item_size = PFR_NEXT_BYTE( p ); |
|
64 item_type = PFR_NEXT_BYTE( p ); |
|
65 |
|
66 PFR_CHECK( item_size ); |
|
67 |
|
68 if ( item_list ) |
|
69 { |
|
70 PFR_ExtraItem extra = item_list; |
|
71 |
|
72 |
|
73 for ( extra = item_list; extra->parser != NULL; extra++ ) |
|
74 { |
|
75 if ( extra->type == item_type ) |
|
76 { |
|
77 error = extra->parser( p, p + item_size, item_data ); |
|
78 if ( error ) goto Exit; |
|
79 |
|
80 break; |
|
81 } |
|
82 } |
|
83 } |
|
84 |
|
85 p += item_size; |
|
86 } |
|
87 |
|
88 Exit: |
|
89 *pp = p; |
|
90 return error; |
|
91 |
|
92 Too_Short: |
|
93 FT_ERROR(( "pfr_extra_items_parse: invalid extra items table\n" )); |
|
94 error = PFR_Err_Invalid_Table; |
|
95 goto Exit; |
|
96 } |
|
97 |
|
98 |
|
99 /*************************************************************************/ |
|
100 /*************************************************************************/ |
|
101 /***** *****/ |
|
102 /***** PFR HEADER *****/ |
|
103 /***** *****/ |
|
104 /*************************************************************************/ |
|
105 /*************************************************************************/ |
|
106 |
|
107 static const FT_Frame_Field pfr_header_fields[] = |
|
108 { |
|
109 #undef FT_STRUCTURE |
|
110 #define FT_STRUCTURE PFR_HeaderRec |
|
111 |
|
112 FT_FRAME_START( 58 ), |
|
113 FT_FRAME_ULONG ( signature ), |
|
114 FT_FRAME_USHORT( version ), |
|
115 FT_FRAME_USHORT( signature2 ), |
|
116 FT_FRAME_USHORT( header_size ), |
|
117 |
|
118 FT_FRAME_USHORT( log_dir_size ), |
|
119 FT_FRAME_USHORT( log_dir_offset ), |
|
120 |
|
121 FT_FRAME_USHORT( log_font_max_size ), |
|
122 FT_FRAME_UOFF3 ( log_font_section_size ), |
|
123 FT_FRAME_UOFF3 ( log_font_section_offset ), |
|
124 |
|
125 FT_FRAME_USHORT( phy_font_max_size ), |
|
126 FT_FRAME_UOFF3 ( phy_font_section_size ), |
|
127 FT_FRAME_UOFF3 ( phy_font_section_offset ), |
|
128 |
|
129 FT_FRAME_USHORT( gps_max_size ), |
|
130 FT_FRAME_UOFF3 ( gps_section_size ), |
|
131 FT_FRAME_UOFF3 ( gps_section_offset ), |
|
132 |
|
133 FT_FRAME_BYTE ( max_blue_values ), |
|
134 FT_FRAME_BYTE ( max_x_orus ), |
|
135 FT_FRAME_BYTE ( max_y_orus ), |
|
136 |
|
137 FT_FRAME_BYTE ( phy_font_max_size_high ), |
|
138 FT_FRAME_BYTE ( color_flags ), |
|
139 |
|
140 FT_FRAME_UOFF3 ( bct_max_size ), |
|
141 FT_FRAME_UOFF3 ( bct_set_max_size ), |
|
142 FT_FRAME_UOFF3 ( phy_bct_set_max_size ), |
|
143 |
|
144 FT_FRAME_USHORT( num_phy_fonts ), |
|
145 FT_FRAME_BYTE ( max_vert_stem_snap ), |
|
146 FT_FRAME_BYTE ( max_horz_stem_snap ), |
|
147 FT_FRAME_USHORT( max_chars ), |
|
148 FT_FRAME_END |
|
149 }; |
|
150 |
|
151 |
|
152 FT_LOCAL_DEF( FT_Error ) |
|
153 pfr_header_load( PFR_Header header, |
|
154 FT_Stream stream ) |
|
155 { |
|
156 FT_Error error; |
|
157 |
|
158 |
|
159 /* read header directly */ |
|
160 if ( !FT_STREAM_SEEK( 0 ) && |
|
161 !FT_STREAM_READ_FIELDS( pfr_header_fields, header ) ) |
|
162 { |
|
163 /* make a few adjustments to the header */ |
|
164 header->phy_font_max_size += |
|
165 (FT_UInt32)header->phy_font_max_size_high << 16; |
|
166 } |
|
167 |
|
168 return error; |
|
169 } |
|
170 |
|
171 |
|
172 FT_LOCAL_DEF( FT_Bool ) |
|
173 pfr_header_check( PFR_Header header ) |
|
174 { |
|
175 FT_Bool result = 1; |
|
176 |
|
177 |
|
178 /* check signature and header size */ |
|
179 if ( header->signature != 0x50465230L || /* "PFR0" */ |
|
180 header->version > 4 || |
|
181 header->header_size < 58 || |
|
182 header->signature2 != 0x0d0a ) /* CR/LF */ |
|
183 { |
|
184 result = 0; |
|
185 } |
|
186 return result; |
|
187 } |
|
188 |
|
189 |
|
190 /***********************************************************************/ |
|
191 /***********************************************************************/ |
|
192 /***** *****/ |
|
193 /***** PFR LOGICAL FONTS *****/ |
|
194 /***** *****/ |
|
195 /***********************************************************************/ |
|
196 /***********************************************************************/ |
|
197 |
|
198 |
|
199 FT_LOCAL_DEF( FT_Error ) |
|
200 pfr_log_font_count( FT_Stream stream, |
|
201 FT_UInt32 section_offset, |
|
202 FT_UInt *acount ) |
|
203 { |
|
204 FT_Error error; |
|
205 FT_UInt count; |
|
206 FT_UInt result = 0; |
|
207 |
|
208 |
|
209 if ( FT_STREAM_SEEK( section_offset ) || FT_READ_USHORT( count ) ) |
|
210 goto Exit; |
|
211 |
|
212 result = count; |
|
213 |
|
214 Exit: |
|
215 *acount = result; |
|
216 return error; |
|
217 } |
|
218 |
|
219 |
|
220 FT_LOCAL_DEF( FT_Error ) |
|
221 pfr_log_font_load( PFR_LogFont log_font, |
|
222 FT_Stream stream, |
|
223 FT_UInt idx, |
|
224 FT_UInt32 section_offset, |
|
225 FT_Bool size_increment ) |
|
226 { |
|
227 FT_UInt num_log_fonts; |
|
228 FT_UInt flags; |
|
229 FT_UInt32 offset; |
|
230 FT_UInt32 size; |
|
231 FT_Error error; |
|
232 |
|
233 |
|
234 if ( FT_STREAM_SEEK( section_offset ) || |
|
235 FT_READ_USHORT( num_log_fonts ) ) |
|
236 goto Exit; |
|
237 |
|
238 if ( idx >= num_log_fonts ) |
|
239 return PFR_Err_Invalid_Argument; |
|
240 |
|
241 if ( FT_STREAM_SKIP( idx * 5 ) || |
|
242 FT_READ_USHORT( size ) || |
|
243 FT_READ_UOFF3 ( offset ) ) |
|
244 goto Exit; |
|
245 |
|
246 /* save logical font size and offset */ |
|
247 log_font->size = size; |
|
248 log_font->offset = offset; |
|
249 |
|
250 /* now, check the rest of the table before loading it */ |
|
251 { |
|
252 FT_Byte* p; |
|
253 FT_Byte* limit; |
|
254 FT_UInt local; |
|
255 |
|
256 |
|
257 if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( size ) ) |
|
258 goto Exit; |
|
259 |
|
260 p = stream->cursor; |
|
261 limit = p + size; |
|
262 |
|
263 PFR_CHECK(13); |
|
264 |
|
265 log_font->matrix[0] = PFR_NEXT_LONG( p ); |
|
266 log_font->matrix[1] = PFR_NEXT_LONG( p ); |
|
267 log_font->matrix[2] = PFR_NEXT_LONG( p ); |
|
268 log_font->matrix[3] = PFR_NEXT_LONG( p ); |
|
269 |
|
270 flags = PFR_NEXT_BYTE( p ); |
|
271 |
|
272 local = 0; |
|
273 if ( flags & PFR_LOG_STROKE ) |
|
274 { |
|
275 local++; |
|
276 if ( flags & PFR_LOG_2BYTE_STROKE ) |
|
277 local++; |
|
278 |
|
279 if ( (flags & PFR_LINE_JOIN_MASK) == PFR_LINE_JOIN_MITER ) |
|
280 local += 3; |
|
281 } |
|
282 if ( flags & PFR_LOG_BOLD ) |
|
283 { |
|
284 local++; |
|
285 if ( flags & PFR_LOG_2BYTE_BOLD ) |
|
286 local++; |
|
287 } |
|
288 |
|
289 PFR_CHECK( local ); |
|
290 |
|
291 if ( flags & PFR_LOG_STROKE ) |
|
292 { |
|
293 log_font->stroke_thickness = ( flags & PFR_LOG_2BYTE_STROKE ) |
|
294 ? PFR_NEXT_SHORT( p ) |
|
295 : PFR_NEXT_BYTE( p ); |
|
296 |
|
297 if ( ( flags & PFR_LINE_JOIN_MASK ) == PFR_LINE_JOIN_MITER ) |
|
298 log_font->miter_limit = PFR_NEXT_LONG( p ); |
|
299 } |
|
300 |
|
301 if ( flags & PFR_LOG_BOLD ) |
|
302 { |
|
303 log_font->bold_thickness = ( flags & PFR_LOG_2BYTE_BOLD ) |
|
304 ? PFR_NEXT_SHORT( p ) |
|
305 : PFR_NEXT_BYTE( p ); |
|
306 } |
|
307 |
|
308 if ( flags & PFR_LOG_EXTRA_ITEMS ) |
|
309 { |
|
310 error = pfr_extra_items_skip( &p, limit ); |
|
311 if (error) goto Fail; |
|
312 } |
|
313 |
|
314 PFR_CHECK(5); |
|
315 log_font->phys_size = PFR_NEXT_USHORT( p ); |
|
316 log_font->phys_offset = PFR_NEXT_ULONG( p ); |
|
317 if ( size_increment ) |
|
318 { |
|
319 PFR_CHECK( 1 ); |
|
320 log_font->phys_size += (FT_UInt32)PFR_NEXT_BYTE( p ) << 16; |
|
321 } |
|
322 } |
|
323 |
|
324 Fail: |
|
325 FT_FRAME_EXIT(); |
|
326 |
|
327 Exit: |
|
328 return error; |
|
329 |
|
330 Too_Short: |
|
331 FT_ERROR(( "pfr_log_font_load: invalid logical font table\n" )); |
|
332 error = PFR_Err_Invalid_Table; |
|
333 goto Fail; |
|
334 } |
|
335 |
|
336 |
|
337 /***********************************************************************/ |
|
338 /***********************************************************************/ |
|
339 /***** *****/ |
|
340 /***** PFR PHYSICAL FONTS *****/ |
|
341 /***** *****/ |
|
342 /***********************************************************************/ |
|
343 /***********************************************************************/ |
|
344 |
|
345 |
|
346 /* load bitmap strikes lists */ |
|
347 FT_CALLBACK_DEF( FT_Error ) |
|
348 pfr_extra_item_load_bitmap_info( FT_Byte* p, |
|
349 FT_Byte* limit, |
|
350 PFR_PhyFont phy_font ) |
|
351 { |
|
352 FT_Memory memory = phy_font->memory; |
|
353 PFR_Strike strike; |
|
354 FT_UInt flags0; |
|
355 FT_UInt n, count, size1; |
|
356 FT_Error error = PFR_Err_Ok; |
|
357 |
|
358 |
|
359 PFR_CHECK( 5 ); |
|
360 |
|
361 p += 3; /* skip bctSize */ |
|
362 flags0 = PFR_NEXT_BYTE( p ); |
|
363 count = PFR_NEXT_BYTE( p ); |
|
364 |
|
365 /* re-allocate when needed */ |
|
366 if ( phy_font->num_strikes + count > phy_font->max_strikes ) |
|
367 { |
|
368 FT_UInt new_max = FT_PAD_CEIL( phy_font->num_strikes + count, 4 ); |
|
369 |
|
370 |
|
371 if ( FT_RENEW_ARRAY( phy_font->strikes, |
|
372 phy_font->num_strikes, |
|
373 new_max ) ) |
|
374 goto Exit; |
|
375 |
|
376 phy_font->max_strikes = new_max; |
|
377 } |
|
378 |
|
379 size1 = 1 + 1 + 1 + 2 + 2 + 1; |
|
380 if ( flags0 & PFR_STRIKE_2BYTE_XPPM ) |
|
381 size1++; |
|
382 |
|
383 if ( flags0 & PFR_STRIKE_2BYTE_YPPM ) |
|
384 size1++; |
|
385 |
|
386 if ( flags0 & PFR_STRIKE_3BYTE_SIZE ) |
|
387 size1++; |
|
388 |
|
389 if ( flags0 & PFR_STRIKE_3BYTE_OFFSET ) |
|
390 size1++; |
|
391 |
|
392 if ( flags0 & PFR_STRIKE_2BYTE_COUNT ) |
|
393 size1++; |
|
394 |
|
395 strike = phy_font->strikes + phy_font->num_strikes; |
|
396 |
|
397 PFR_CHECK( count * size1 ); |
|
398 |
|
399 for ( n = 0; n < count; n++, strike++ ) |
|
400 { |
|
401 strike->x_ppm = ( flags0 & PFR_STRIKE_2BYTE_XPPM ) |
|
402 ? PFR_NEXT_USHORT( p ) |
|
403 : PFR_NEXT_BYTE( p ); |
|
404 |
|
405 strike->y_ppm = ( flags0 & PFR_STRIKE_2BYTE_YPPM ) |
|
406 ? PFR_NEXT_USHORT( p ) |
|
407 : PFR_NEXT_BYTE( p ); |
|
408 |
|
409 strike->flags = PFR_NEXT_BYTE( p ); |
|
410 |
|
411 strike->bct_size = ( flags0 & PFR_STRIKE_3BYTE_SIZE ) |
|
412 ? PFR_NEXT_ULONG( p ) |
|
413 : PFR_NEXT_USHORT( p ); |
|
414 |
|
415 strike->bct_offset = ( flags0 & PFR_STRIKE_3BYTE_OFFSET ) |
|
416 ? PFR_NEXT_ULONG( p ) |
|
417 : PFR_NEXT_USHORT( p ); |
|
418 |
|
419 strike->num_bitmaps = ( flags0 & PFR_STRIKE_2BYTE_COUNT ) |
|
420 ? PFR_NEXT_USHORT( p ) |
|
421 : PFR_NEXT_BYTE( p ); |
|
422 } |
|
423 |
|
424 phy_font->num_strikes += count; |
|
425 |
|
426 Exit: |
|
427 return error; |
|
428 |
|
429 Too_Short: |
|
430 error = PFR_Err_Invalid_Table; |
|
431 FT_ERROR(( "pfr_extra_item_load_bitmap_info:" |
|
432 " invalid bitmap info table\n" )); |
|
433 goto Exit; |
|
434 } |
|
435 |
|
436 |
|
437 /* Load font ID. This is a so-called "unique" name that is rather |
|
438 * long and descriptive (like "Tiresias ScreenFont v7.51"). |
|
439 * |
|
440 * Note that a PFR font's family name is contained in an *undocumented* |
|
441 * string of the "auxiliary data" portion of a physical font record. This |
|
442 * may also contain the "real" style name! |
|
443 * |
|
444 * If no family name is present, the font ID is used instead for the |
|
445 * family. |
|
446 */ |
|
447 FT_CALLBACK_DEF( FT_Error ) |
|
448 pfr_extra_item_load_font_id( FT_Byte* p, |
|
449 FT_Byte* limit, |
|
450 PFR_PhyFont phy_font ) |
|
451 { |
|
452 FT_Error error = PFR_Err_Ok; |
|
453 FT_Memory memory = phy_font->memory; |
|
454 FT_PtrDist len = limit - p; |
|
455 |
|
456 |
|
457 if ( phy_font->font_id != NULL ) |
|
458 goto Exit; |
|
459 |
|
460 if ( FT_ALLOC( phy_font->font_id, len + 1 ) ) |
|
461 goto Exit; |
|
462 |
|
463 /* copy font ID name, and terminate it for safety */ |
|
464 FT_MEM_COPY( phy_font->font_id, p, len ); |
|
465 phy_font->font_id[len] = 0; |
|
466 |
|
467 Exit: |
|
468 return error; |
|
469 } |
|
470 |
|
471 |
|
472 /* load stem snap tables */ |
|
473 FT_CALLBACK_DEF( FT_Error ) |
|
474 pfr_extra_item_load_stem_snaps( FT_Byte* p, |
|
475 FT_Byte* limit, |
|
476 PFR_PhyFont phy_font ) |
|
477 { |
|
478 FT_UInt count, num_vert, num_horz; |
|
479 FT_Int* snaps; |
|
480 FT_Error error = PFR_Err_Ok; |
|
481 FT_Memory memory = phy_font->memory; |
|
482 |
|
483 |
|
484 if ( phy_font->vertical.stem_snaps != NULL ) |
|
485 goto Exit; |
|
486 |
|
487 PFR_CHECK( 1 ); |
|
488 count = PFR_NEXT_BYTE( p ); |
|
489 |
|
490 num_vert = count & 15; |
|
491 num_horz = count >> 4; |
|
492 count = num_vert + num_horz; |
|
493 |
|
494 PFR_CHECK( count * 2 ); |
|
495 |
|
496 if ( FT_NEW_ARRAY( snaps, count ) ) |
|
497 goto Exit; |
|
498 |
|
499 phy_font->vertical.stem_snaps = snaps; |
|
500 phy_font->horizontal.stem_snaps = snaps + num_vert; |
|
501 |
|
502 for ( ; count > 0; count--, snaps++ ) |
|
503 *snaps = FT_NEXT_SHORT( p ); |
|
504 |
|
505 Exit: |
|
506 return error; |
|
507 |
|
508 Too_Short: |
|
509 error = PFR_Err_Invalid_Table; |
|
510 FT_ERROR(( "pfr_exta_item_load_stem_snaps:" |
|
511 " invalid stem snaps table\n" )); |
|
512 goto Exit; |
|
513 } |
|
514 |
|
515 |
|
516 |
|
517 /* load kerning pair data */ |
|
518 FT_CALLBACK_DEF( FT_Error ) |
|
519 pfr_extra_item_load_kerning_pairs( FT_Byte* p, |
|
520 FT_Byte* limit, |
|
521 PFR_PhyFont phy_font ) |
|
522 { |
|
523 PFR_KernItem item = NULL; |
|
524 FT_Error error = PFR_Err_Ok; |
|
525 FT_Memory memory = phy_font->memory; |
|
526 |
|
527 |
|
528 FT_TRACE2(( "pfr_extra_item_load_kerning_pairs()\n" )); |
|
529 |
|
530 if ( FT_NEW( item ) ) |
|
531 goto Exit; |
|
532 |
|
533 PFR_CHECK( 4 ); |
|
534 |
|
535 item->pair_count = PFR_NEXT_BYTE( p ); |
|
536 item->base_adj = PFR_NEXT_SHORT( p ); |
|
537 item->flags = PFR_NEXT_BYTE( p ); |
|
538 item->offset = phy_font->offset + ( p - phy_font->cursor ); |
|
539 |
|
540 #ifndef PFR_CONFIG_NO_CHECKS |
|
541 item->pair_size = 3; |
|
542 |
|
543 if ( item->flags & PFR_KERN_2BYTE_CHAR ) |
|
544 item->pair_size += 2; |
|
545 |
|
546 if ( item->flags & PFR_KERN_2BYTE_ADJ ) |
|
547 item->pair_size += 1; |
|
548 |
|
549 PFR_CHECK( item->pair_count * item->pair_size ); |
|
550 #endif |
|
551 |
|
552 /* load first and last pairs into the item to speed up */ |
|
553 /* lookup later... */ |
|
554 if ( item->pair_count > 0 ) |
|
555 { |
|
556 FT_UInt char1, char2; |
|
557 FT_Byte* q; |
|
558 |
|
559 |
|
560 if ( item->flags & PFR_KERN_2BYTE_CHAR ) |
|
561 { |
|
562 q = p; |
|
563 char1 = PFR_NEXT_USHORT( q ); |
|
564 char2 = PFR_NEXT_USHORT( q ); |
|
565 |
|
566 item->pair1 = PFR_KERN_INDEX( char1, char2 ); |
|
567 |
|
568 q = p + item->pair_size * ( item->pair_count - 1 ); |
|
569 char1 = PFR_NEXT_USHORT( q ); |
|
570 char2 = PFR_NEXT_USHORT( q ); |
|
571 |
|
572 item->pair2 = PFR_KERN_INDEX( char1, char2 ); |
|
573 } |
|
574 else |
|
575 { |
|
576 q = p; |
|
577 char1 = PFR_NEXT_BYTE( q ); |
|
578 char2 = PFR_NEXT_BYTE( q ); |
|
579 |
|
580 item->pair1 = PFR_KERN_INDEX( char1, char2 ); |
|
581 |
|
582 q = p + item->pair_size * ( item->pair_count - 1 ); |
|
583 char1 = PFR_NEXT_BYTE( q ); |
|
584 char2 = PFR_NEXT_BYTE( q ); |
|
585 |
|
586 item->pair2 = PFR_KERN_INDEX( char1, char2 ); |
|
587 } |
|
588 |
|
589 /* add new item to the current list */ |
|
590 item->next = NULL; |
|
591 *phy_font->kern_items_tail = item; |
|
592 phy_font->kern_items_tail = &item->next; |
|
593 phy_font->num_kern_pairs += item->pair_count; |
|
594 } |
|
595 else |
|
596 { |
|
597 /* empty item! */ |
|
598 FT_FREE( item ); |
|
599 } |
|
600 |
|
601 Exit: |
|
602 return error; |
|
603 |
|
604 Too_Short: |
|
605 FT_FREE( item ); |
|
606 |
|
607 error = PFR_Err_Invalid_Table; |
|
608 FT_ERROR(( "pfr_extra_item_load_kerning_pairs:" |
|
609 " invalid kerning pairs table\n" )); |
|
610 goto Exit; |
|
611 } |
|
612 |
|
613 |
|
614 |
|
615 static const PFR_ExtraItemRec pfr_phy_font_extra_items[] = |
|
616 { |
|
617 { 1, (PFR_ExtraItem_ParseFunc)pfr_extra_item_load_bitmap_info }, |
|
618 { 2, (PFR_ExtraItem_ParseFunc)pfr_extra_item_load_font_id }, |
|
619 { 3, (PFR_ExtraItem_ParseFunc)pfr_extra_item_load_stem_snaps }, |
|
620 { 4, (PFR_ExtraItem_ParseFunc)pfr_extra_item_load_kerning_pairs }, |
|
621 { 0, NULL } |
|
622 }; |
|
623 |
|
624 |
|
625 /* Loads a name from the auxiliary data. Since this extracts undocumented |
|
626 * strings from the font file, we need to be careful here. |
|
627 */ |
|
628 static FT_Error |
|
629 pfr_aux_name_load( FT_Byte* p, |
|
630 FT_UInt len, |
|
631 FT_Memory memory, |
|
632 FT_String* *astring ) |
|
633 { |
|
634 FT_Error error = PFR_Err_Ok; |
|
635 FT_String* result = NULL; |
|
636 FT_UInt n, ok; |
|
637 |
|
638 |
|
639 if ( len > 0 && p[len - 1] == 0 ) |
|
640 len--; |
|
641 |
|
642 /* check that each character is ASCII for making sure not to |
|
643 load garbage |
|
644 */ |
|
645 ok = ( len > 0 ); |
|
646 for ( n = 0; n < len; n++ ) |
|
647 if ( p[n] < 32 || p[n] > 127 ) |
|
648 { |
|
649 ok = 0; |
|
650 break; |
|
651 } |
|
652 |
|
653 if ( ok ) |
|
654 { |
|
655 if ( FT_ALLOC( result, len + 1 ) ) |
|
656 goto Exit; |
|
657 |
|
658 FT_MEM_COPY( result, p, len ); |
|
659 result[len] = 0; |
|
660 } |
|
661 Exit: |
|
662 *astring = result; |
|
663 return error; |
|
664 } |
|
665 |
|
666 |
|
667 FT_LOCAL_DEF( void ) |
|
668 pfr_phy_font_done( PFR_PhyFont phy_font, |
|
669 FT_Memory memory ) |
|
670 { |
|
671 FT_FREE( phy_font->font_id ); |
|
672 FT_FREE( phy_font->family_name ); |
|
673 FT_FREE( phy_font->style_name ); |
|
674 |
|
675 FT_FREE( phy_font->vertical.stem_snaps ); |
|
676 phy_font->vertical.num_stem_snaps = 0; |
|
677 |
|
678 phy_font->horizontal.stem_snaps = NULL; |
|
679 phy_font->horizontal.num_stem_snaps = 0; |
|
680 |
|
681 FT_FREE( phy_font->strikes ); |
|
682 phy_font->num_strikes = 0; |
|
683 phy_font->max_strikes = 0; |
|
684 |
|
685 FT_FREE( phy_font->chars ); |
|
686 phy_font->num_chars = 0; |
|
687 phy_font->chars_offset = 0; |
|
688 |
|
689 FT_FREE( phy_font->blue_values ); |
|
690 phy_font->num_blue_values = 0; |
|
691 |
|
692 { |
|
693 PFR_KernItem item, next; |
|
694 |
|
695 |
|
696 item = phy_font->kern_items; |
|
697 while ( item ) |
|
698 { |
|
699 next = item->next; |
|
700 FT_FREE( item ); |
|
701 item = next; |
|
702 } |
|
703 phy_font->kern_items = NULL; |
|
704 phy_font->kern_items_tail = NULL; |
|
705 } |
|
706 |
|
707 phy_font->num_kern_pairs = 0; |
|
708 } |
|
709 |
|
710 |
|
711 FT_LOCAL_DEF( FT_Error ) |
|
712 pfr_phy_font_load( PFR_PhyFont phy_font, |
|
713 FT_Stream stream, |
|
714 FT_UInt32 offset, |
|
715 FT_UInt32 size ) |
|
716 { |
|
717 FT_Error error; |
|
718 FT_Memory memory = stream->memory; |
|
719 FT_UInt flags; |
|
720 FT_ULong num_aux; |
|
721 FT_Byte* p; |
|
722 FT_Byte* limit; |
|
723 |
|
724 |
|
725 phy_font->memory = memory; |
|
726 phy_font->offset = offset; |
|
727 |
|
728 phy_font->kern_items = NULL; |
|
729 phy_font->kern_items_tail = &phy_font->kern_items; |
|
730 |
|
731 if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( size ) ) |
|
732 goto Exit; |
|
733 |
|
734 phy_font->cursor = stream->cursor; |
|
735 |
|
736 p = stream->cursor; |
|
737 limit = p + size; |
|
738 |
|
739 PFR_CHECK( 15 ); |
|
740 phy_font->font_ref_number = PFR_NEXT_USHORT( p ); |
|
741 phy_font->outline_resolution = PFR_NEXT_USHORT( p ); |
|
742 phy_font->metrics_resolution = PFR_NEXT_USHORT( p ); |
|
743 phy_font->bbox.xMin = PFR_NEXT_SHORT( p ); |
|
744 phy_font->bbox.yMin = PFR_NEXT_SHORT( p ); |
|
745 phy_font->bbox.xMax = PFR_NEXT_SHORT( p ); |
|
746 phy_font->bbox.yMax = PFR_NEXT_SHORT( p ); |
|
747 phy_font->flags = flags = PFR_NEXT_BYTE( p ); |
|
748 |
|
749 /* get the standard advance for non-proportional fonts */ |
|
750 if ( !(flags & PFR_PHY_PROPORTIONAL) ) |
|
751 { |
|
752 PFR_CHECK( 2 ); |
|
753 phy_font->standard_advance = PFR_NEXT_SHORT( p ); |
|
754 } |
|
755 |
|
756 /* load the extra items when present */ |
|
757 if ( flags & PFR_PHY_EXTRA_ITEMS ) |
|
758 { |
|
759 error = pfr_extra_items_parse( &p, limit, |
|
760 pfr_phy_font_extra_items, phy_font ); |
|
761 |
|
762 if ( error ) |
|
763 goto Fail; |
|
764 } |
|
765 |
|
766 /* In certain fonts, the auxiliary bytes contain interesting */ |
|
767 /* information. These are not in the specification but can be */ |
|
768 /* guessed by looking at the content of a few PFR0 fonts. */ |
|
769 PFR_CHECK( 3 ); |
|
770 num_aux = PFR_NEXT_ULONG( p ); |
|
771 |
|
772 if ( num_aux > 0 ) |
|
773 { |
|
774 FT_Byte* q = p; |
|
775 FT_Byte* q2; |
|
776 |
|
777 |
|
778 PFR_CHECK( num_aux ); |
|
779 p += num_aux; |
|
780 |
|
781 while ( num_aux > 0 ) |
|
782 { |
|
783 FT_UInt length, type; |
|
784 |
|
785 |
|
786 if ( q + 4 > p ) |
|
787 break; |
|
788 |
|
789 length = PFR_NEXT_USHORT( q ); |
|
790 if ( length < 4 || length > num_aux ) |
|
791 break; |
|
792 |
|
793 q2 = q + length - 2; |
|
794 type = PFR_NEXT_USHORT( q ); |
|
795 |
|
796 switch ( type ) |
|
797 { |
|
798 case 1: |
|
799 /* this seems to correspond to the font's family name, |
|
800 * padded to 16-bits with one zero when necessary |
|
801 */ |
|
802 error = pfr_aux_name_load( q, length - 4U, memory, |
|
803 &phy_font->family_name ); |
|
804 if ( error ) |
|
805 goto Exit; |
|
806 break; |
|
807 |
|
808 case 2: |
|
809 if ( q + 32 > q2 ) |
|
810 break; |
|
811 |
|
812 q += 10; |
|
813 phy_font->ascent = PFR_NEXT_SHORT( q ); |
|
814 phy_font->descent = PFR_NEXT_SHORT( q ); |
|
815 phy_font->leading = PFR_NEXT_SHORT( q ); |
|
816 q += 16; |
|
817 break; |
|
818 |
|
819 case 3: |
|
820 /* this seems to correspond to the font's style name, |
|
821 * padded to 16-bits with one zero when necessary |
|
822 */ |
|
823 error = pfr_aux_name_load( q, length - 4U, memory, |
|
824 &phy_font->style_name ); |
|
825 if ( error ) |
|
826 goto Exit; |
|
827 break; |
|
828 |
|
829 default: |
|
830 ; |
|
831 } |
|
832 |
|
833 q = q2; |
|
834 num_aux -= length; |
|
835 } |
|
836 } |
|
837 |
|
838 /* read the blue values */ |
|
839 { |
|
840 FT_UInt n, count; |
|
841 |
|
842 |
|
843 PFR_CHECK( 1 ); |
|
844 phy_font->num_blue_values = count = PFR_NEXT_BYTE( p ); |
|
845 |
|
846 PFR_CHECK( count * 2 ); |
|
847 |
|
848 if ( FT_NEW_ARRAY( phy_font->blue_values, count ) ) |
|
849 goto Fail; |
|
850 |
|
851 for ( n = 0; n < count; n++ ) |
|
852 phy_font->blue_values[n] = PFR_NEXT_SHORT( p ); |
|
853 } |
|
854 |
|
855 PFR_CHECK( 8 ); |
|
856 phy_font->blue_fuzz = PFR_NEXT_BYTE( p ); |
|
857 phy_font->blue_scale = PFR_NEXT_BYTE( p ); |
|
858 |
|
859 phy_font->vertical.standard = PFR_NEXT_USHORT( p ); |
|
860 phy_font->horizontal.standard = PFR_NEXT_USHORT( p ); |
|
861 |
|
862 /* read the character descriptors */ |
|
863 { |
|
864 FT_UInt n, count, Size; |
|
865 |
|
866 |
|
867 phy_font->num_chars = count = PFR_NEXT_USHORT( p ); |
|
868 phy_font->chars_offset = offset + ( p - stream->cursor ); |
|
869 |
|
870 if ( FT_NEW_ARRAY( phy_font->chars, count ) ) |
|
871 goto Fail; |
|
872 |
|
873 Size = 1 + 1 + 2; |
|
874 if ( flags & PFR_PHY_2BYTE_CHARCODE ) |
|
875 Size += 1; |
|
876 |
|
877 if ( flags & PFR_PHY_PROPORTIONAL ) |
|
878 Size += 2; |
|
879 |
|
880 if ( flags & PFR_PHY_ASCII_CODE ) |
|
881 Size += 1; |
|
882 |
|
883 if ( flags & PFR_PHY_2BYTE_GPS_SIZE ) |
|
884 Size += 1; |
|
885 |
|
886 if ( flags & PFR_PHY_3BYTE_GPS_OFFSET ) |
|
887 Size += 1; |
|
888 |
|
889 PFR_CHECK( count * Size ); |
|
890 |
|
891 for ( n = 0; n < count; n++ ) |
|
892 { |
|
893 PFR_Char cur = &phy_font->chars[n]; |
|
894 |
|
895 |
|
896 cur->char_code = ( flags & PFR_PHY_2BYTE_CHARCODE ) |
|
897 ? PFR_NEXT_USHORT( p ) |
|
898 : PFR_NEXT_BYTE( p ); |
|
899 |
|
900 cur->advance = ( flags & PFR_PHY_PROPORTIONAL ) |
|
901 ? PFR_NEXT_SHORT( p ) |
|
902 : (FT_Int) phy_font->standard_advance; |
|
903 |
|
904 #if 0 |
|
905 cur->ascii = ( flags & PFR_PHY_ASCII_CODE ) |
|
906 ? PFR_NEXT_BYTE( p ) |
|
907 : 0; |
|
908 #else |
|
909 if ( flags & PFR_PHY_ASCII_CODE ) |
|
910 p += 1; |
|
911 #endif |
|
912 cur->gps_size = ( flags & PFR_PHY_2BYTE_GPS_SIZE ) |
|
913 ? PFR_NEXT_USHORT( p ) |
|
914 : PFR_NEXT_BYTE( p ); |
|
915 |
|
916 cur->gps_offset = ( flags & PFR_PHY_3BYTE_GPS_OFFSET ) |
|
917 ? PFR_NEXT_ULONG( p ) |
|
918 : PFR_NEXT_USHORT( p ); |
|
919 } |
|
920 } |
|
921 |
|
922 /* that's it! */ |
|
923 |
|
924 Fail: |
|
925 FT_FRAME_EXIT(); |
|
926 |
|
927 /* save position of bitmap info */ |
|
928 phy_font->bct_offset = FT_STREAM_POS(); |
|
929 phy_font->cursor = NULL; |
|
930 |
|
931 Exit: |
|
932 return error; |
|
933 |
|
934 Too_Short: |
|
935 error = PFR_Err_Invalid_Table; |
|
936 FT_ERROR(( "pfr_phy_font_load: invalid physical font table\n" )); |
|
937 goto Fail; |
|
938 } |
|
939 |
|
940 |
|
941 /* END */ |