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16<title>TIFFGetField</title>
17
18</head>
19<body>
20
21<h1 align="center">TIFFGetField</h1>
22
23<a href="#NAME">NAME</a><br>
24<a href="#SYNOPSIS">SYNOPSIS</a><br>
25<a href="#DESCRIPTION">DESCRIPTION</a><br>
26<a href="#AUTOREGISTERED TAGS">AUTOREGISTERED TAGS</a><br>
27<a href="#RETURN VALUES">RETURN VALUES</a><br>
28<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
29<a href="#SEE ALSO">SEE ALSO</a><br>
30
31<hr>
32
33
34<h2>NAME
35<a name="NAME"></a>
36</h2>
37
38
39<p style="margin-left:11%; margin-top: 1em">TIFFGetField,
40TIFFVGetField &minus; get the value(s) of a tag in an open
41<small>TIFF</small> file</p>
42
43<h2>SYNOPSIS
44<a name="SYNOPSIS"></a>
45</h2>
46
47
48<p style="margin-left:11%; margin-top: 1em"><b>#include
49&lt;tiffio.h&gt;</b></p>
50
51<p style="margin-left:11%; margin-top: 1em"><b>int
52TIFFGetField(TIFF *</b><i>tif</i><b>, ttag_t</b>
53<i>tag</i><b>,</b> <i>...</i><b>)</b></p>
54
55<p style="margin-left:11%; margin-top: 1em"><b>#include
56&lt;stdarg.h&gt;</b></p>
57
58<p style="margin-left:11%; margin-top: 1em"><b>int
59TIFFVGetField(TIFF *</b><i>tif</i><b>, ttag_t</b>
60<i>tag</i><b>, va_list</b> <i>ap</i><b>) <br>
61int TIFFGetFieldDefaulted(TIFF *</b><i>tif</i><b>,
62ttag_t</b> <i>tag</i><b>,</b> <i>...</i><b>) <br>
63int TIFFVGetFieldDefaulted(TIFF *</b><i>tif</i><b>,
64ttag_t</b> <i>tag</i><b>, va_list</b> <i>ap</i><b>)</b></p>
65
66<h2>DESCRIPTION
67<a name="DESCRIPTION"></a>
68</h2>
69
70
71
72<p style="margin-left:11%; margin-top: 1em"><b><i>TIFFGetField</i></b>
73returns the value of a tag or pseudo-tag associated with the
74the current directory of the opened <small>TIFF</small> file
75<i>tif</i>. (A <i>pseudo-tag</i> is a parameter that is used
76to control the operation of the <small>TIFF</small> library
77but whose value is not read or written to the underlying
78file.) The file must have been previously opened with
79<i>TIFFOpen</i>(3TIFF). The tag is identified by <i>tag</i>,
80one of the values defined in the include file <b>tiff.h</b>
81(see also the table below). The type and number of values
82returned is dependent on the tag being requested. The
83programming interface uses a variable argument list as
84prescribed by the <i>stdarg</i>(3) interface. The returned
85values should only be interpreted if <i>TIFFGetField</i>
86returns 1.</p>
87
88
89<p style="margin-left:11%; margin-top: 1em"><i>TIFFVGetField</i>
90is functionally equivalent to <i>TIFFGetField</i> except
91that it takes a pointer to a variable argument list.
92<i>TIFFVGetField</i> is useful for layering interfaces on
93top of the functionality provided by
94<i>TIFFGetField</i>.</p>
95
96
97<p style="margin-left:11%; margin-top: 1em"><i>TIFFGetFieldDefaulted</i>
98and <i>TIFFVGetFieldDefaulted</i> are identical to
99<i>TIFFGetField</i> and <i>TIFFVGetField</i>, except that if
100a tag is not defined in the current directory and it has a
101default value, then the default value is returned.</p>
102
103<p style="margin-left:11%; margin-top: 1em">The tags
104understood by <i>libtiff(3TIFF),</i> the number of parameter
105values, and the types for the returned values are shown
106below. The data types are specified as in C and correspond
107to the types used to specify tag values to
108<i>TIFFSetField</i>(3TIFF). Remember that
109<i>TIFFGetField</i> returns parameter values, so all the
110listed data types are pointers to storage where values
111should be returned. Consult the <small>TIFF</small>
112specification (or relevant industry specification) for
113information on the meaning of each tag and their possible
114values.</p>
115
116<table width="100%" border="0" rules="none" frame="void"
117       cellspacing="0" cellpadding="0">
118<tr valign="top" align="left">
119<td width="11%"></td>
120<td width="38%">
121
122
123<p><i>Tag Name</i></p></td>
124<td width="11%"></td>
125<td width="28%">
126
127
128<p><i>Count</i></p></td>
129<td width="12%">
130</td></tr>
131<tr valign="top" align="left">
132<td width="11%"></td>
133<td width="38%"></td>
134<td width="11%"></td>
135<td width="28%">
136
137
138<p><i>Types</i></p></td>
139<td width="12%">
140
141
142<p><i>Notes</i></p></td></tr>
143<tr valign="top" align="left">
144<td width="11%"></td>
145<td width="38%">
146
147
148<p>TIFFTAG_ARTIST</p></td>
149<td width="11%"></td>
150<td width="28%">
151
152
153<p>1</p></td>
154<td width="12%">
155</td></tr>
156<tr valign="top" align="left">
157<td width="11%"></td>
158<td width="38%"></td>
159<td width="11%"></td>
160<td width="28%">
161
162
163<p>char**</p></td>
164<td width="12%">
165</td></tr>
166<tr valign="top" align="left">
167<td width="11%"></td>
168<td width="38%">
169
170
171<p>TIFFTAG_BADFAXLINES</p></td>
172<td width="11%"></td>
173<td width="28%">
174
175
176<p>1</p></td>
177<td width="12%">
178</td></tr>
179<tr valign="top" align="left">
180<td width="11%"></td>
181<td width="38%"></td>
182<td width="11%"></td>
183<td width="28%">
184
185
186<p>uint32*</p></td>
187<td width="12%">
188</td></tr>
189<tr valign="top" align="left">
190<td width="11%"></td>
191<td width="38%">
192
193
194<p>TIFFTAG_BITSPERSAMPLE</p></td>
195<td width="11%"></td>
196<td width="28%">
197
198
199<p>1</p></td>
200<td width="12%">
201</td></tr>
202<tr valign="top" align="left">
203<td width="11%"></td>
204<td width="38%"></td>
205<td width="11%"></td>
206<td width="28%">
207
208
209<p>uint16*</p></td>
210<td width="12%">
211</td></tr>
212<tr valign="top" align="left">
213<td width="11%"></td>
214<td width="38%">
215
216
217<p>TIFFTAG_CLEANFAXDATA</p></td>
218<td width="11%"></td>
219<td width="28%">
220
221
222<p>1</p></td>
223<td width="12%">
224</td></tr>
225<tr valign="top" align="left">
226<td width="11%"></td>
227<td width="38%"></td>
228<td width="11%"></td>
229<td width="28%">
230
231
232<p>uint16*</p></td>
233<td width="12%">
234</td></tr>
235<tr valign="top" align="left">
236<td width="11%"></td>
237<td width="38%">
238
239
240<p>TIFFTAG_COLORMAP</p></td>
241<td width="11%"></td>
242<td width="28%">
243
244
245<p>3</p></td>
246<td width="12%">
247</td></tr>
248<tr valign="top" align="left">
249<td width="11%"></td>
250<td width="38%"></td>
251<td width="11%"></td>
252<td width="28%">
253
254
255<p>uint16**</p></td>
256<td width="12%">
257
258
259<p>1&lt;&lt;BitsPerSample arrays</p></td></tr>
260<tr valign="top" align="left">
261<td width="11%"></td>
262<td width="38%">
263
264
265<p>TIFFTAG_COMPRESSION</p></td>
266<td width="11%"></td>
267<td width="28%">
268
269
270<p>1</p></td>
271<td width="12%">
272</td></tr>
273<tr valign="top" align="left">
274<td width="11%"></td>
275<td width="38%"></td>
276<td width="11%"></td>
277<td width="28%">
278
279
280<p>uint16*</p></td>
281<td width="12%">
282</td></tr>
283<tr valign="top" align="left">
284<td width="11%"></td>
285<td width="38%">
286
287
288<p>TIFFTAG_CONSECUTIVEBADFAXLINES</p></td>
289<td width="11%"></td>
290<td width="28%">
291
292
293<p>1</p></td>
294<td width="12%">
295</td></tr>
296<tr valign="top" align="left">
297<td width="11%"></td>
298<td width="38%"></td>
299<td width="11%"></td>
300<td width="28%">
301
302
303<p>uint32*</p></td>
304<td width="12%">
305</td></tr>
306<tr valign="top" align="left">
307<td width="11%"></td>
308<td width="38%">
309
310
311<p>TIFFTAG_COPYRIGHT</p></td>
312<td width="11%"></td>
313<td width="28%">
314
315
316<p>1</p></td>
317<td width="12%">
318</td></tr>
319<tr valign="top" align="left">
320<td width="11%"></td>
321<td width="38%"></td>
322<td width="11%"></td>
323<td width="28%">
324
325
326<p>char**</p></td>
327<td width="12%">
328</td></tr>
329<tr valign="top" align="left">
330<td width="11%"></td>
331<td width="38%">
332
333
334<p>TIFFTAG_DATATYPE</p></td>
335<td width="11%"></td>
336<td width="28%">
337
338
339<p>1</p></td>
340<td width="12%">
341</td></tr>
342<tr valign="top" align="left">
343<td width="11%"></td>
344<td width="38%"></td>
345<td width="11%"></td>
346<td width="28%">
347
348
349<p>uint16*</p></td>
350<td width="12%">
351</td></tr>
352<tr valign="top" align="left">
353<td width="11%"></td>
354<td width="38%">
355
356
357<p>TIFFTAG_DATETIME</p></td>
358<td width="11%"></td>
359<td width="28%">
360
361
362<p>1</p></td>
363<td width="12%">
364</td></tr>
365<tr valign="top" align="left">
366<td width="11%"></td>
367<td width="38%"></td>
368<td width="11%"></td>
369<td width="28%">
370
371
372<p>char**</p></td>
373<td width="12%">
374</td></tr>
375<tr valign="top" align="left">
376<td width="11%"></td>
377<td width="38%">
378
379
380<p>TIFFTAG_DOCUMENTNAME</p></td>
381<td width="11%"></td>
382<td width="28%">
383
384
385<p>1</p></td>
386<td width="12%">
387</td></tr>
388<tr valign="top" align="left">
389<td width="11%"></td>
390<td width="38%"></td>
391<td width="11%"></td>
392<td width="28%">
393
394
395<p>char**</p></td>
396<td width="12%">
397</td></tr>
398<tr valign="top" align="left">
399<td width="11%"></td>
400<td width="38%">
401
402
403<p>TIFFTAG_DOTRANGE</p></td>
404<td width="11%"></td>
405<td width="28%">
406
407
408<p>2</p></td>
409<td width="12%">
410</td></tr>
411<tr valign="top" align="left">
412<td width="11%"></td>
413<td width="38%"></td>
414<td width="11%"></td>
415<td width="28%">
416
417
418<p>uint16*</p></td>
419<td width="12%">
420</td></tr>
421<tr valign="top" align="left">
422<td width="11%"></td>
423<td width="38%">
424
425
426<p>TIFFTAG_EXTRASAMPLES</p></td>
427<td width="11%"></td>
428<td width="28%">
429
430
431<p>2</p></td>
432<td width="12%">
433</td></tr>
434<tr valign="top" align="left">
435<td width="11%"></td>
436<td width="38%"></td>
437<td width="11%"></td>
438<td width="28%">
439
440
441<p>uint16*,uint16**</p></td>
442<td width="12%">
443
444
445<p>count &amp; types array</p></td></tr>
446<tr valign="top" align="left">
447<td width="11%"></td>
448<td width="38%">
449
450
451<p>TIFFTAG_FAXFILLFUNC</p></td>
452<td width="11%"></td>
453<td width="28%">
454
455
456<p>1</p></td>
457<td width="12%">
458</td></tr>
459<tr valign="top" align="left">
460<td width="11%"></td>
461<td width="38%"></td>
462<td width="11%"></td>
463<td width="28%">
464
465
466<p>TIFFFaxFillFunc*</p></td>
467<td width="12%">
468
469
470<p>G3/G4 compression pseudo-tag</p></td></tr>
471<tr valign="top" align="left">
472<td width="11%"></td>
473<td width="38%">
474
475
476<p>TIFFTAG_FAXMODE</p></td>
477<td width="11%"></td>
478<td width="28%">
479
480
481<p>1</p></td>
482<td width="12%">
483</td></tr>
484<tr valign="top" align="left">
485<td width="11%"></td>
486<td width="38%"></td>
487<td width="11%"></td>
488<td width="28%">
489
490
491<p>int*</p></td>
492<td width="12%">
493
494
495<p>G3/G4 compression pseudo-tag</p></td></tr>
496<tr valign="top" align="left">
497<td width="11%"></td>
498<td width="38%">
499
500
501<p>TIFFTAG_FILLORDER</p></td>
502<td width="11%"></td>
503<td width="28%">
504
505
506<p>1</p></td>
507<td width="12%">
508</td></tr>
509<tr valign="top" align="left">
510<td width="11%"></td>
511<td width="38%"></td>
512<td width="11%"></td>
513<td width="28%">
514
515
516<p>uint16*</p></td>
517<td width="12%">
518</td></tr>
519<tr valign="top" align="left">
520<td width="11%"></td>
521<td width="38%">
522
523
524<p>TIFFTAG_GROUP3OPTIONS</p></td>
525<td width="11%"></td>
526<td width="28%">
527
528
529<p>1</p></td>
530<td width="12%">
531</td></tr>
532<tr valign="top" align="left">
533<td width="11%"></td>
534<td width="38%"></td>
535<td width="11%"></td>
536<td width="28%">
537
538
539<p>uint32*</p></td>
540<td width="12%">
541</td></tr>
542<tr valign="top" align="left">
543<td width="11%"></td>
544<td width="38%">
545
546
547<p>TIFFTAG_GROUP4OPTIONS</p></td>
548<td width="11%"></td>
549<td width="28%">
550
551
552<p>1</p></td>
553<td width="12%">
554</td></tr>
555<tr valign="top" align="left">
556<td width="11%"></td>
557<td width="38%"></td>
558<td width="11%"></td>
559<td width="28%">
560
561
562<p>uint32*</p></td>
563<td width="12%">
564</td></tr>
565<tr valign="top" align="left">
566<td width="11%"></td>
567<td width="38%">
568
569
570<p>TIFFTAG_HALFTONEHINTS</p></td>
571<td width="11%"></td>
572<td width="28%">
573
574
575<p>2</p></td>
576<td width="12%">
577</td></tr>
578<tr valign="top" align="left">
579<td width="11%"></td>
580<td width="38%"></td>
581<td width="11%"></td>
582<td width="28%">
583
584
585<p>uint16*</p></td>
586<td width="12%">
587</td></tr>
588<tr valign="top" align="left">
589<td width="11%"></td>
590<td width="38%">
591
592
593<p>TIFFTAG_HOSTCOMPUTER</p></td>
594<td width="11%"></td>
595<td width="28%">
596
597
598<p>1</p></td>
599<td width="12%">
600</td></tr>
601<tr valign="top" align="left">
602<td width="11%"></td>
603<td width="38%"></td>
604<td width="11%"></td>
605<td width="28%">
606
607
608<p>char**</p></td>
609<td width="12%">
610</td></tr>
611<tr valign="top" align="left">
612<td width="11%"></td>
613<td width="38%">
614
615
616<p>TIFFTAG_ICCPROFILE</p></td>
617<td width="11%"></td>
618<td width="28%">
619
620
621<p>2</p></td>
622<td width="12%">
623</td></tr>
624<tr valign="top" align="left">
625<td width="11%"></td>
626<td width="38%"></td>
627<td width="11%"></td>
628<td width="28%">
629
630
631<p>uint32*,void**</p></td>
632<td width="12%">
633
634
635<p>count, profile data</p></td></tr>
636<tr valign="top" align="left">
637<td width="11%"></td>
638<td width="38%">
639
640
641<p>TIFFTAG_IMAGEDEPTH</p></td>
642<td width="11%"></td>
643<td width="28%">
644
645
646<p>1</p></td>
647<td width="12%">
648</td></tr>
649<tr valign="top" align="left">
650<td width="11%"></td>
651<td width="38%"></td>
652<td width="11%"></td>
653<td width="28%">
654
655
656<p>uint32*</p></td>
657<td width="12%">
658</td></tr>
659<tr valign="top" align="left">
660<td width="11%"></td>
661<td width="38%">
662
663
664<p>TIFFTAG_IMAGEDESCRIPTION</p></td>
665<td width="11%"></td>
666<td width="28%">
667
668
669<p>1</p></td>
670<td width="12%">
671</td></tr>
672<tr valign="top" align="left">
673<td width="11%"></td>
674<td width="38%"></td>
675<td width="11%"></td>
676<td width="28%">
677
678
679<p>char**</p></td>
680<td width="12%">
681</td></tr>
682<tr valign="top" align="left">
683<td width="11%"></td>
684<td width="38%">
685
686
687<p>TIFFTAG_IMAGELENGTH</p></td>
688<td width="11%"></td>
689<td width="28%">
690
691
692<p>1</p></td>
693<td width="12%">
694</td></tr>
695<tr valign="top" align="left">
696<td width="11%"></td>
697<td width="38%"></td>
698<td width="11%"></td>
699<td width="28%">
700
701
702<p>uint32*</p></td>
703<td width="12%">
704</td></tr>
705<tr valign="top" align="left">
706<td width="11%"></td>
707<td width="38%">
708
709
710<p>TIFFTAG_IMAGEWIDTH</p></td>
711<td width="11%"></td>
712<td width="28%">
713
714
715<p>1</p></td>
716<td width="12%">
717</td></tr>
718<tr valign="top" align="left">
719<td width="11%"></td>
720<td width="38%"></td>
721<td width="11%"></td>
722<td width="28%">
723
724
725<p>uint32*</p></td>
726<td width="12%">
727</td></tr>
728<tr valign="top" align="left">
729<td width="11%"></td>
730<td width="38%">
731
732
733<p>TIFFTAG_INKNAMES</p></td>
734<td width="11%"></td>
735<td width="28%">
736
737
738<p>1</p></td>
739<td width="12%">
740</td></tr>
741<tr valign="top" align="left">
742<td width="11%"></td>
743<td width="38%"></td>
744<td width="11%"></td>
745<td width="28%">
746
747
748<p>char**</p></td>
749<td width="12%">
750</td></tr>
751<tr valign="top" align="left">
752<td width="11%"></td>
753<td width="38%">
754
755
756<p>TIFFTAG_INKSET</p></td>
757<td width="11%"></td>
758<td width="28%">
759
760
761<p>1</p></td>
762<td width="12%">
763</td></tr>
764<tr valign="top" align="left">
765<td width="11%"></td>
766<td width="38%"></td>
767<td width="11%"></td>
768<td width="28%">
769
770
771<p>uint16*</p></td>
772<td width="12%">
773</td></tr>
774<tr valign="top" align="left">
775<td width="11%"></td>
776<td width="38%">
777
778
779<p>TIFFTAG_JPEGCOLORMODE</p></td>
780<td width="11%"></td>
781<td width="28%">
782
783
784<p>1</p></td>
785<td width="12%">
786</td></tr>
787<tr valign="top" align="left">
788<td width="11%"></td>
789<td width="38%"></td>
790<td width="11%"></td>
791<td width="28%">
792
793
794<p>int*</p></td>
795<td width="12%">
796
797
798<p>JPEG pseudo-tag</p></td></tr>
799<tr valign="top" align="left">
800<td width="11%"></td>
801<td width="38%">
802
803
804<p>TIFFTAG_JPEGQUALITY</p></td>
805<td width="11%"></td>
806<td width="28%">
807
808
809<p>1</p></td>
810<td width="12%">
811</td></tr>
812<tr valign="top" align="left">
813<td width="11%"></td>
814<td width="38%"></td>
815<td width="11%"></td>
816<td width="28%">
817
818
819<p>int*</p></td>
820<td width="12%">
821
822
823<p>JPEG pseudo-tag</p></td></tr>
824<tr valign="top" align="left">
825<td width="11%"></td>
826<td width="38%">
827
828
829<p>TIFFTAG_JPEGTABLES</p></td>
830<td width="11%"></td>
831<td width="28%">
832
833
834<p>2</p></td>
835<td width="12%">
836</td></tr>
837<tr valign="top" align="left">
838<td width="11%"></td>
839<td width="38%"></td>
840<td width="11%"></td>
841<td width="28%">
842
843
844<p>uint32*,void**</p></td>
845<td width="12%">
846
847
848<p>count &amp; tables</p></td></tr>
849<tr valign="top" align="left">
850<td width="11%"></td>
851<td width="38%">
852
853
854<p>TIFFTAG_JPEGTABLESMODE</p></td>
855<td width="11%"></td>
856<td width="28%">
857
858
859<p>1</p></td>
860<td width="12%">
861</td></tr>
862<tr valign="top" align="left">
863<td width="11%"></td>
864<td width="38%"></td>
865<td width="11%"></td>
866<td width="28%">
867
868
869<p>int*</p></td>
870<td width="12%">
871
872
873<p>JPEG pseudo-tag</p></td></tr>
874<tr valign="top" align="left">
875<td width="11%"></td>
876<td width="38%">
877
878
879<p>TIFFTAG_MAKE</p></td>
880<td width="11%"></td>
881<td width="28%">
882
883
884<p>1</p></td>
885<td width="12%">
886</td></tr>
887<tr valign="top" align="left">
888<td width="11%"></td>
889<td width="38%"></td>
890<td width="11%"></td>
891<td width="28%">
892
893
894<p>char**</p></td>
895<td width="12%">
896</td></tr>
897<tr valign="top" align="left">
898<td width="11%"></td>
899<td width="38%">
900
901
902<p>TIFFTAG_MATTEING</p></td>
903<td width="11%"></td>
904<td width="28%">
905
906
907<p>1</p></td>
908<td width="12%">
909</td></tr>
910<tr valign="top" align="left">
911<td width="11%"></td>
912<td width="38%"></td>
913<td width="11%"></td>
914<td width="28%">
915
916
917<p>uint16*</p></td>
918<td width="12%">
919</td></tr>
920<tr valign="top" align="left">
921<td width="11%"></td>
922<td width="38%">
923
924
925<p>TIFFTAG_MAXSAMPLEVALUE</p></td>
926<td width="11%"></td>
927<td width="28%">
928
929
930<p>1</p></td>
931<td width="12%">
932</td></tr>
933<tr valign="top" align="left">
934<td width="11%"></td>
935<td width="38%"></td>
936<td width="11%"></td>
937<td width="28%">
938
939
940<p>uint16*</p></td>
941<td width="12%">
942</td></tr>
943<tr valign="top" align="left">
944<td width="11%"></td>
945<td width="38%">
946
947
948<p>TIFFTAG_MINSAMPLEVALUE</p></td>
949<td width="11%"></td>
950<td width="28%">
951
952
953<p>1</p></td>
954<td width="12%">
955</td></tr>
956<tr valign="top" align="left">
957<td width="11%"></td>
958<td width="38%"></td>
959<td width="11%"></td>
960<td width="28%">
961
962
963<p>uint16*</p></td>
964<td width="12%">
965</td></tr>
966<tr valign="top" align="left">
967<td width="11%"></td>
968<td width="38%">
969
970
971<p>TIFFTAG_MODEL</p></td>
972<td width="11%"></td>
973<td width="28%">
974
975
976<p>1</p></td>
977<td width="12%">
978</td></tr>
979<tr valign="top" align="left">
980<td width="11%"></td>
981<td width="38%"></td>
982<td width="11%"></td>
983<td width="28%">
984
985
986<p>char**</p></td>
987<td width="12%">
988</td></tr>
989<tr valign="top" align="left">
990<td width="11%"></td>
991<td width="38%">
992
993
994<p>TIFFTAG_ORIENTATION</p></td>
995<td width="11%"></td>
996<td width="28%">
997
998
999<p>1</p></td>
1000<td width="12%">
1001</td></tr>
1002<tr valign="top" align="left">
1003<td width="11%"></td>
1004<td width="38%"></td>
1005<td width="11%"></td>
1006<td width="28%">
1007
1008
1009<p>uint16*</p></td>
1010<td width="12%">
1011</td></tr>
1012<tr valign="top" align="left">
1013<td width="11%"></td>
1014<td width="38%">
1015
1016
1017<p>TIFFTAG_PAGENAME</p></td>
1018<td width="11%"></td>
1019<td width="28%">
1020
1021
1022<p>1</p></td>
1023<td width="12%">
1024</td></tr>
1025<tr valign="top" align="left">
1026<td width="11%"></td>
1027<td width="38%"></td>
1028<td width="11%"></td>
1029<td width="28%">
1030
1031
1032<p>char**</p></td>
1033<td width="12%">
1034</td></tr>
1035<tr valign="top" align="left">
1036<td width="11%"></td>
1037<td width="38%">
1038
1039
1040<p>TIFFTAG_PAGENUMBER</p></td>
1041<td width="11%"></td>
1042<td width="28%">
1043
1044
1045<p>2</p></td>
1046<td width="12%">
1047</td></tr>
1048<tr valign="top" align="left">
1049<td width="11%"></td>
1050<td width="38%"></td>
1051<td width="11%"></td>
1052<td width="28%">
1053
1054
1055<p>uint16*</p></td>
1056<td width="12%">
1057</td></tr>
1058<tr valign="top" align="left">
1059<td width="11%"></td>
1060<td width="38%">
1061
1062
1063<p>TIFFTAG_PHOTOMETRIC</p></td>
1064<td width="11%"></td>
1065<td width="28%">
1066
1067
1068<p>1</p></td>
1069<td width="12%">
1070</td></tr>
1071<tr valign="top" align="left">
1072<td width="11%"></td>
1073<td width="38%"></td>
1074<td width="11%"></td>
1075<td width="28%">
1076
1077
1078<p>uint16*</p></td>
1079<td width="12%">
1080</td></tr>
1081<tr valign="top" align="left">
1082<td width="11%"></td>
1083<td width="38%">
1084
1085
1086<p>TIFFTAG_PHOTOSHOP</p></td>
1087<td width="11%"></td>
1088<td width="28%">
1089
1090
1091<p>2</p></td>
1092<td width="12%">
1093</td></tr>
1094<tr valign="top" align="left">
1095<td width="11%"></td>
1096<td width="38%"></td>
1097<td width="11%"></td>
1098<td width="28%">
1099
1100
1101<p>uint32*,void**</p></td>
1102<td width="12%">
1103
1104
1105<p>count, data</p></td></tr>
1106<tr valign="top" align="left">
1107<td width="11%"></td>
1108<td width="38%">
1109
1110
1111<p>TIFFTAG_PLANARCONFIG</p></td>
1112<td width="11%"></td>
1113<td width="28%">
1114
1115
1116<p>1</p></td>
1117<td width="12%">
1118</td></tr>
1119<tr valign="top" align="left">
1120<td width="11%"></td>
1121<td width="38%"></td>
1122<td width="11%"></td>
1123<td width="28%">
1124
1125
1126<p>uint16*</p></td>
1127<td width="12%">
1128</td></tr>
1129<tr valign="top" align="left">
1130<td width="11%"></td>
1131<td width="38%">
1132
1133
1134<p>TIFFTAG_PREDICTOR</p></td>
1135<td width="11%"></td>
1136<td width="28%">
1137
1138
1139<p>1</p></td>
1140<td width="12%">
1141</td></tr>
1142<tr valign="top" align="left">
1143<td width="11%"></td>
1144<td width="38%"></td>
1145<td width="11%"></td>
1146<td width="28%">
1147
1148
1149<p>uint16*</p></td>
1150<td width="12%">
1151</td></tr>
1152<tr valign="top" align="left">
1153<td width="11%"></td>
1154<td width="38%">
1155
1156
1157<p>TIFFTAG_PRIMARYCHROMATICITIES</p></td>
1158<td width="11%"></td>
1159<td width="28%">
1160
1161
1162<p>1</p></td>
1163<td width="12%">
1164</td></tr>
1165<tr valign="top" align="left">
1166<td width="11%"></td>
1167<td width="38%"></td>
1168<td width="11%"></td>
1169<td width="28%">
1170
1171
1172<p>float**</p></td>
1173<td width="12%">
1174
1175
1176<p>6-entry array</p></td></tr>
1177<tr valign="top" align="left">
1178<td width="11%"></td>
1179<td width="38%">
1180
1181
1182<p>TIFFTAG_REFERENCEBLACKWHITE</p></td>
1183<td width="11%"></td>
1184<td width="28%">
1185
1186
1187<p>1</p></td>
1188<td width="12%">
1189</td></tr>
1190<tr valign="top" align="left">
1191<td width="11%"></td>
1192<td width="38%"></td>
1193<td width="11%"></td>
1194<td width="28%">
1195
1196
1197<p>float**</p></td>
1198<td width="12%">
1199
1200
1201<p>6-entry array</p></td></tr>
1202<tr valign="top" align="left">
1203<td width="11%"></td>
1204<td width="38%">
1205
1206
1207<p>TIFFTAG_RESOLUTIONUNIT</p></td>
1208<td width="11%"></td>
1209<td width="28%">
1210
1211
1212<p>1</p></td>
1213<td width="12%">
1214</td></tr>
1215<tr valign="top" align="left">
1216<td width="11%"></td>
1217<td width="38%"></td>
1218<td width="11%"></td>
1219<td width="28%">
1220
1221
1222<p>uint16*</p></td>
1223<td width="12%">
1224</td></tr>
1225<tr valign="top" align="left">
1226<td width="11%"></td>
1227<td width="38%">
1228
1229
1230<p>TIFFTAG_RICHTIFFIPTC</p></td>
1231<td width="11%"></td>
1232<td width="28%">
1233
1234
1235<p>2</p></td>
1236<td width="12%">
1237</td></tr>
1238<tr valign="top" align="left">
1239<td width="11%"></td>
1240<td width="38%"></td>
1241<td width="11%"></td>
1242<td width="28%">
1243
1244
1245<p>uint32*,void**</p></td>
1246<td width="12%">
1247
1248
1249<p>count, data</p></td></tr>
1250<tr valign="top" align="left">
1251<td width="11%"></td>
1252<td width="38%">
1253
1254
1255<p>TIFFTAG_ROWSPERSTRIP</p></td>
1256<td width="11%"></td>
1257<td width="28%">
1258
1259
1260<p>1</p></td>
1261<td width="12%">
1262</td></tr>
1263<tr valign="top" align="left">
1264<td width="11%"></td>
1265<td width="38%"></td>
1266<td width="11%"></td>
1267<td width="28%">
1268
1269
1270<p>uint32*</p></td>
1271<td width="12%">
1272</td></tr>
1273<tr valign="top" align="left">
1274<td width="11%"></td>
1275<td width="38%">
1276
1277
1278<p>TIFFTAG_SAMPLEFORMAT</p></td>
1279<td width="11%"></td>
1280<td width="28%">
1281
1282
1283<p>1</p></td>
1284<td width="12%">
1285</td></tr>
1286<tr valign="top" align="left">
1287<td width="11%"></td>
1288<td width="38%"></td>
1289<td width="11%"></td>
1290<td width="28%">
1291
1292
1293<p>uint16*</p></td>
1294<td width="12%">
1295</td></tr>
1296<tr valign="top" align="left">
1297<td width="11%"></td>
1298<td width="38%">
1299
1300
1301<p>TIFFTAG_SAMPLESPERPIXEL</p></td>
1302<td width="11%"></td>
1303<td width="28%">
1304
1305
1306<p>1</p></td>
1307<td width="12%">
1308</td></tr>
1309<tr valign="top" align="left">
1310<td width="11%"></td>
1311<td width="38%"></td>
1312<td width="11%"></td>
1313<td width="28%">
1314
1315
1316<p>uint16*</p></td>
1317<td width="12%">
1318</td></tr>
1319<tr valign="top" align="left">
1320<td width="11%"></td>
1321<td width="38%">
1322
1323
1324<p>TIFFTAG_SMAXSAMPLEVALUE</p></td>
1325<td width="11%"></td>
1326<td width="28%">
1327
1328
1329<p>1</p></td>
1330<td width="12%">
1331</td></tr>
1332<tr valign="top" align="left">
1333<td width="11%"></td>
1334<td width="38%"></td>
1335<td width="11%"></td>
1336<td width="28%">
1337
1338
1339<p>double*</p></td>
1340<td width="12%">
1341</td></tr>
1342<tr valign="top" align="left">
1343<td width="11%"></td>
1344<td width="38%">
1345
1346
1347<p>TIFFTAG_SMINSAMPLEVALUE</p></td>
1348<td width="11%"></td>
1349<td width="28%">
1350
1351
1352<p>1</p></td>
1353<td width="12%">
1354</td></tr>
1355<tr valign="top" align="left">
1356<td width="11%"></td>
1357<td width="38%"></td>
1358<td width="11%"></td>
1359<td width="28%">
1360
1361
1362<p>double*</p></td>
1363<td width="12%">
1364</td></tr>
1365<tr valign="top" align="left">
1366<td width="11%"></td>
1367<td width="38%">
1368
1369
1370<p>TIFFTAG_SOFTWARE</p></td>
1371<td width="11%"></td>
1372<td width="28%">
1373
1374
1375<p>1</p></td>
1376<td width="12%">
1377</td></tr>
1378<tr valign="top" align="left">
1379<td width="11%"></td>
1380<td width="38%"></td>
1381<td width="11%"></td>
1382<td width="28%">
1383
1384
1385<p>char**</p></td>
1386<td width="12%">
1387</td></tr>
1388<tr valign="top" align="left">
1389<td width="11%"></td>
1390<td width="38%">
1391
1392
1393<p>TIFFTAG_STONITS</p></td>
1394<td width="11%"></td>
1395<td width="28%">
1396
1397
1398<p>1</p></td>
1399<td width="12%">
1400</td></tr>
1401<tr valign="top" align="left">
1402<td width="11%"></td>
1403<td width="38%"></td>
1404<td width="11%"></td>
1405<td width="28%">
1406
1407
1408<p>double**</p></td>
1409<td width="12%">
1410</td></tr>
1411<tr valign="top" align="left">
1412<td width="11%"></td>
1413<td width="38%">
1414
1415
1416<p>TIFFTAG_STRIPBYTECOUNTS</p></td>
1417<td width="11%"></td>
1418<td width="28%">
1419
1420
1421<p>1</p></td>
1422<td width="12%">
1423</td></tr>
1424<tr valign="top" align="left">
1425<td width="11%"></td>
1426<td width="38%"></td>
1427<td width="11%"></td>
1428<td width="28%">
1429
1430
1431<p>uint32**</p></td>
1432<td width="12%">
1433</td></tr>
1434<tr valign="top" align="left">
1435<td width="11%"></td>
1436<td width="38%">
1437
1438
1439<p>TIFFTAG_STRIPOFFSETS</p></td>
1440<td width="11%"></td>
1441<td width="28%">
1442
1443
1444<p>1</p></td>
1445<td width="12%">
1446</td></tr>
1447<tr valign="top" align="left">
1448<td width="11%"></td>
1449<td width="38%"></td>
1450<td width="11%"></td>
1451<td width="28%">
1452
1453
1454<p>uint32**</p></td>
1455<td width="12%">
1456</td></tr>
1457<tr valign="top" align="left">
1458<td width="11%"></td>
1459<td width="38%">
1460
1461
1462<p>TIFFTAG_SUBFILETYPE</p></td>
1463<td width="11%"></td>
1464<td width="28%">
1465
1466
1467<p>1</p></td>
1468<td width="12%">
1469</td></tr>
1470<tr valign="top" align="left">
1471<td width="11%"></td>
1472<td width="38%"></td>
1473<td width="11%"></td>
1474<td width="28%">
1475
1476
1477<p>uint32*</p></td>
1478<td width="12%">
1479</td></tr>
1480<tr valign="top" align="left">
1481<td width="11%"></td>
1482<td width="38%">
1483
1484
1485<p>TIFFTAG_SUBIFD</p></td>
1486<td width="11%"></td>
1487<td width="28%">
1488
1489
1490<p>2</p></td>
1491<td width="12%">
1492</td></tr>
1493<tr valign="top" align="left">
1494<td width="11%"></td>
1495<td width="38%"></td>
1496<td width="11%"></td>
1497<td width="28%">
1498
1499
1500<p>uint16*,uint32**</p></td>
1501<td width="12%">
1502
1503
1504<p>count &amp; offsets array</p></td></tr>
1505<tr valign="top" align="left">
1506<td width="11%"></td>
1507<td width="38%">
1508
1509
1510<p>TIFFTAG_TARGETPRINTER</p></td>
1511<td width="11%"></td>
1512<td width="28%">
1513
1514
1515<p>1</p></td>
1516<td width="12%">
1517</td></tr>
1518<tr valign="top" align="left">
1519<td width="11%"></td>
1520<td width="38%"></td>
1521<td width="11%"></td>
1522<td width="28%">
1523
1524
1525<p>char**</p></td>
1526<td width="12%">
1527</td></tr>
1528<tr valign="top" align="left">
1529<td width="11%"></td>
1530<td width="38%">
1531
1532
1533<p>TIFFTAG_THRESHHOLDING</p></td>
1534<td width="11%"></td>
1535<td width="28%">
1536
1537
1538<p>1</p></td>
1539<td width="12%">
1540</td></tr>
1541<tr valign="top" align="left">
1542<td width="11%"></td>
1543<td width="38%"></td>
1544<td width="11%"></td>
1545<td width="28%">
1546
1547
1548<p>uint16*</p></td>
1549<td width="12%">
1550</td></tr>
1551<tr valign="top" align="left">
1552<td width="11%"></td>
1553<td width="38%">
1554
1555
1556<p>TIFFTAG_TILEBYTECOUNTS</p></td>
1557<td width="11%"></td>
1558<td width="28%">
1559
1560
1561<p>1</p></td>
1562<td width="12%">
1563</td></tr>
1564<tr valign="top" align="left">
1565<td width="11%"></td>
1566<td width="38%"></td>
1567<td width="11%"></td>
1568<td width="28%">
1569
1570
1571<p>uint32**</p></td>
1572<td width="12%">
1573</td></tr>
1574<tr valign="top" align="left">
1575<td width="11%"></td>
1576<td width="38%">
1577
1578
1579<p>TIFFTAG_TILEDEPTH</p></td>
1580<td width="11%"></td>
1581<td width="28%">
1582
1583
1584<p>1</p></td>
1585<td width="12%">
1586</td></tr>
1587<tr valign="top" align="left">
1588<td width="11%"></td>
1589<td width="38%"></td>
1590<td width="11%"></td>
1591<td width="28%">
1592
1593
1594<p>uint32*</p></td>
1595<td width="12%">
1596</td></tr>
1597<tr valign="top" align="left">
1598<td width="11%"></td>
1599<td width="38%">
1600
1601
1602<p>TIFFTAG_TILELENGTH</p></td>
1603<td width="11%"></td>
1604<td width="28%">
1605
1606
1607<p>1</p></td>
1608<td width="12%">
1609</td></tr>
1610<tr valign="top" align="left">
1611<td width="11%"></td>
1612<td width="38%"></td>
1613<td width="11%"></td>
1614<td width="28%">
1615
1616
1617<p>uint32*</p></td>
1618<td width="12%">
1619</td></tr>
1620<tr valign="top" align="left">
1621<td width="11%"></td>
1622<td width="38%">
1623
1624
1625<p>TIFFTAG_TILEOFFSETS</p></td>
1626<td width="11%"></td>
1627<td width="28%">
1628
1629
1630<p>1</p></td>
1631<td width="12%">
1632</td></tr>
1633<tr valign="top" align="left">
1634<td width="11%"></td>
1635<td width="38%"></td>
1636<td width="11%"></td>
1637<td width="28%">
1638
1639
1640<p>uint32**</p></td>
1641<td width="12%">
1642</td></tr>
1643<tr valign="top" align="left">
1644<td width="11%"></td>
1645<td width="38%">
1646
1647
1648<p>TIFFTAG_TILEWIDTH</p></td>
1649<td width="11%"></td>
1650<td width="28%">
1651
1652
1653<p>1</p></td>
1654<td width="12%">
1655</td></tr>
1656<tr valign="top" align="left">
1657<td width="11%"></td>
1658<td width="38%"></td>
1659<td width="11%"></td>
1660<td width="28%">
1661
1662
1663<p>uint32*</p></td>
1664<td width="12%">
1665</td></tr>
1666<tr valign="top" align="left">
1667<td width="11%"></td>
1668<td width="38%">
1669
1670
1671<p>TIFFTAG_TRANSFERFUNCTION</p></td>
1672<td width="11%"></td>
1673<td width="28%">
1674
1675
1676<p>1 or 3&dagger;</p></td>
1677<td width="12%">
1678
1679
1680<p>uint16**1&lt;&lt;BitsPerSample entry arrays</p></td></tr>
1681<tr valign="top" align="left">
1682<td width="11%"></td>
1683<td width="38%">
1684
1685
1686<p>TIFFTAG_WHITEPOINT</p></td>
1687<td width="11%"></td>
1688<td width="28%">
1689
1690
1691<p>1</p></td>
1692<td width="12%">
1693</td></tr>
1694<tr valign="top" align="left">
1695<td width="11%"></td>
1696<td width="38%"></td>
1697<td width="11%"></td>
1698<td width="28%">
1699
1700
1701<p>float**</p></td>
1702<td width="12%">
1703
1704
1705<p>2-entry array</p></td></tr>
1706<tr valign="top" align="left">
1707<td width="11%"></td>
1708<td width="38%">
1709
1710
1711<p>TIFFTAG_XMLPACKET</p></td>
1712<td width="11%"></td>
1713<td width="28%">
1714
1715
1716<p>2</p></td>
1717<td width="12%">
1718</td></tr>
1719<tr valign="top" align="left">
1720<td width="11%"></td>
1721<td width="38%"></td>
1722<td width="11%"></td>
1723<td width="28%">
1724
1725
1726<p>uint32*,void**</p></td>
1727<td width="12%">
1728
1729
1730<p>count, data</p></td></tr>
1731<tr valign="top" align="left">
1732<td width="11%"></td>
1733<td width="38%">
1734
1735
1736<p>TIFFTAG_XPOSITION</p></td>
1737<td width="11%"></td>
1738<td width="28%">
1739
1740
1741<p>1</p></td>
1742<td width="12%">
1743</td></tr>
1744<tr valign="top" align="left">
1745<td width="11%"></td>
1746<td width="38%"></td>
1747<td width="11%"></td>
1748<td width="28%">
1749
1750
1751<p>float*</p></td>
1752<td width="12%">
1753</td></tr>
1754<tr valign="top" align="left">
1755<td width="11%"></td>
1756<td width="38%">
1757
1758
1759<p>TIFFTAG_XRESOLUTION</p></td>
1760<td width="11%"></td>
1761<td width="28%">
1762
1763
1764<p>1</p></td>
1765<td width="12%">
1766</td></tr>
1767<tr valign="top" align="left">
1768<td width="11%"></td>
1769<td width="38%"></td>
1770<td width="11%"></td>
1771<td width="28%">
1772
1773
1774<p>float*</p></td>
1775<td width="12%">
1776</td></tr>
1777<tr valign="top" align="left">
1778<td width="11%"></td>
1779<td width="38%">
1780
1781
1782<p>TIFFTAG_YCBCRCOEFFICIENTS</p></td>
1783<td width="11%"></td>
1784<td width="28%">
1785
1786
1787<p>1</p></td>
1788<td width="12%">
1789</td></tr>
1790<tr valign="top" align="left">
1791<td width="11%"></td>
1792<td width="38%"></td>
1793<td width="11%"></td>
1794<td width="28%">
1795
1796
1797<p>float**</p></td>
1798<td width="12%">
1799
1800
1801<p>3-entry array</p></td></tr>
1802<tr valign="top" align="left">
1803<td width="11%"></td>
1804<td width="38%">
1805
1806
1807<p>TIFFTAG_YCBCRPOSITIONING</p></td>
1808<td width="11%"></td>
1809<td width="28%">
1810
1811
1812<p>1</p></td>
1813<td width="12%">
1814</td></tr>
1815<tr valign="top" align="left">
1816<td width="11%"></td>
1817<td width="38%"></td>
1818<td width="11%"></td>
1819<td width="28%">
1820
1821
1822<p>uint16*</p></td>
1823<td width="12%">
1824</td></tr>
1825<tr valign="top" align="left">
1826<td width="11%"></td>
1827<td width="38%">
1828
1829
1830<p>TIFFTAG_YCBCRSUBSAMPLING</p></td>
1831<td width="11%"></td>
1832<td width="28%">
1833
1834
1835<p>2</p></td>
1836<td width="12%">
1837</td></tr>
1838<tr valign="top" align="left">
1839<td width="11%"></td>
1840<td width="38%"></td>
1841<td width="11%"></td>
1842<td width="28%">
1843
1844
1845<p>uint16*</p></td>
1846<td width="12%">
1847</td></tr>
1848<tr valign="top" align="left">
1849<td width="11%"></td>
1850<td width="38%">
1851
1852
1853<p>TIFFTAG_YPOSITION</p></td>
1854<td width="11%"></td>
1855<td width="28%">
1856
1857
1858<p>1</p></td>
1859<td width="12%">
1860</td></tr>
1861<tr valign="top" align="left">
1862<td width="11%"></td>
1863<td width="38%"></td>
1864<td width="11%"></td>
1865<td width="28%">
1866
1867
1868<p>float*</p></td>
1869<td width="12%">
1870</td></tr>
1871<tr valign="top" align="left">
1872<td width="11%"></td>
1873<td width="38%">
1874
1875
1876<p>TIFFTAG_YRESOLUTION</p></td>
1877<td width="11%"></td>
1878<td width="28%">
1879
1880
1881<p>1</p></td>
1882<td width="12%">
1883</td></tr>
1884<tr valign="top" align="left">
1885<td width="11%"></td>
1886<td width="38%"></td>
1887<td width="11%"></td>
1888<td width="28%">
1889
1890
1891<p>float*&Dagger;</p></td>
1892<td width="12%">
1893</td></tr>
1894</table>
1895
1896<p style="margin-left:11%;">&dagger; If
1897<i>SamplesPerPixel</i> is one, then a single array is
1898returned; otherwise three arrays are returned. <br>
1899&Dagger; The contents of this field are quite complex. See
1900<i>The ICC Profile Format Specification</i>, Annex B.3
1901&quot;Embedding ICC Profiles in TIFF Files&quot; (available
1902at http://www.color.org) for an explanation.</p>
1903
1904<h2>AUTOREGISTERED TAGS
1905<a name="AUTOREGISTERED TAGS"></a>
1906</h2>
1907
1908
1909<p style="margin-left:11%; margin-top: 1em">If you
1910can&rsquo;t find the tag in the table above that means this
1911is unsupported tag. But you still be able to read it&rsquo;s
1912value if you know the data type of that tag. For example, if
1913you want to read the LONG value from the tag 33424 and ASCII
1914string from the tag 36867 you can use the following
1915code:</p>
1916
1917<p style="margin-left:22%; margin-top: 1em">uint16 count;
1918<br>
1919void *data;</p>
1920
1921
1922<p style="margin-left:22%; margin-top: 1em">TIFFGetField(tiff,
192333424, &amp;count, &amp;data); <br>
1924printf(&quot;Tag %d: %d, count %d0, 33424, *(uint32 *)data,
1925count); <br>
1926TIFFGetField(tiff, 36867, &amp;count, &amp;data); <br>
1927printf(&quot;Tag %d: %s, count %d0, 36867, (char *)data,
1928count);</p>
1929
1930<p style="margin-left:11%; margin-top: 1em">is not
1931supported by <b>libtiff(3TIFF),</b> library</p>
1932
1933<h2>RETURN VALUES
1934<a name="RETURN VALUES"></a>
1935</h2>
1936
1937
1938<p style="margin-left:11%; margin-top: 1em">1 is returned
1939if the tag is defined in the current directory; otherwise a
19400 is returned.</p>
1941
1942<h2>DIAGNOSTICS
1943<a name="DIAGNOSTICS"></a>
1944</h2>
1945
1946
1947<p style="margin-left:11%; margin-top: 1em">All error
1948messages are directed to the <b>TIFFError</b>(3TIFF)
1949routine.</p>
1950
1951<p style="margin-left:11%; margin-top: 1em"><b>Unknown
1952field, tag 0x%x</b>. An unknown tag was supplied.</p>
1953
1954<h2>SEE ALSO
1955<a name="SEE ALSO"></a>
1956</h2>
1957
1958
1959
1960<p style="margin-left:11%; margin-top: 1em"><b>TIFFOpen</b>(3TIFF),
1961<b>TIFFSetField</b>(3TIFF), <b>TIFFSetDirectory</b>(3TIFF),
1962<b>TIFFReadDirectory</b>(3TIFF),
1963<b>TIFFWriteDirectory</b>(3TIFF) <b>libtiff</b>(3TIFF),</p>
1964
1965<p style="margin-left:11%; margin-top: 1em">Libtiff library
1966home page: <b>http://www.simplesystems.org/libtiff/</b></p>
1967<hr>
1968</body>
1969</html>
1970