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1<!-- Creator : groff version 1.18.1 -->
2<!-- CreationDate: Fri Jul 13 17:43:14 2007 -->
3<html>
4<head>
5<meta name="generator" content="groff -Thtml, see www.gnu.org">
6<meta name="Content-Style" content="text/css">
7<title>INTRO</title>
8</head>
9<body>
10
11<h1 align=center>INTRO</h1>
12<a href="#NAME">NAME</a><br>
13<a href="#SYNOPSIS">SYNOPSIS</a><br>
14<a href="#DESCRIPTION">DESCRIPTION</a><br>
15<a href="#DATA TYPES">DATA TYPES</a><br>
16<a href="#LIST OF ROUTINES">LIST OF ROUTINES</a><br>
17<a href="#TAG USAGE">TAG USAGE</a><br>
18<a href="#PSEUDO TAGS">PSEUDO TAGS</a><br>
19<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
20<a href="#SEE ALSO">SEE ALSO</a><br>
21<a href="#BUGS">BUGS</a><br>
22
23<hr>
24<a name="NAME"></a>
25<h2>NAME</h2>
26<!-- INDENTATION -->
27<table width="100%" border=0 rules="none" frame="void"
28 cols="2" cellspacing="0" cellpadding="0">
29<tr valign="top" align="left">
30<td width="8%"></td>
31<td width="91%">
32<p><big>libtiff &minus; introduction to <i>libtiff</i>, a
33library for reading and writing</big> TIFF
34<big>files</big></p>
35</td>
36</table>
37<a name="SYNOPSIS"></a>
38<h2>SYNOPSIS</h2>
39<!-- INDENTATION -->
40<table width="100%" border=0 rules="none" frame="void"
41 cols="2" cellspacing="0" cellpadding="0">
42<tr valign="top" align="left">
43<td width="8%"></td>
44<td width="91%">
45<p><big><b>#include &lt;tiffio.h&gt;</b></big></p>
46<!-- INDENTATION -->
47<p><big>cc file.c <b>-ltiff</b></big></p>
48</td>
49</table>
50<a name="DESCRIPTION"></a>
51<h2>DESCRIPTION</h2>
52<!-- INDENTATION -->
53<table width="100%" border=0 rules="none" frame="void"
54 cols="2" cellspacing="0" cellpadding="0">
55<tr valign="top" align="left">
56<td width="8%"></td>
57<td width="91%">
58<p><big><i>libtiff</i> is a library for reading and writing
59data files encoded with the <i>Tag Image File</i> format,
60Revision 6.0 (or revision 5.0 or revision 4.0). This file
61format is suitable for archiving multi-color and
62monochromatic image data.</big></p>
63<!-- INDENTATION -->
64<p><big>The library supports several compression algorithms,
65as indicated by the <i>Compression</i> field, including: no
66compression (1),</big> CCITT <big>1D Huffman compression
67(2),</big> CCITT <big>Group 3 Facsimile compression
68(3),</big> CCITT <big>Group 4 Facsimile compression (4),
69Lempel-Ziv &amp; Welch compression (5), baseline JPEG
70compression (7), word-aligned 1D Huffman compression
71(32771), and PackBits compression (32773). In addition,
72several nonstandard compression algorithms are supported:
73the 4-bit compression algorithm used by the
74<i>ThunderScan</i> program (32809) (decompression only),
75NeXT&rsquo;s 2-bit compression algorithm (32766)
76(decompression only), an experimental LZ-style algorithm
77known as Deflate (32946), and an experimental CIE LogLuv
78compression scheme designed for images with high dynamic
79range (32845 for LogL and 32845 for LogLuv). Directory
80information may be in either little- or big-endian byte
81order&minus;byte swapping is automatically done by the
82library. Data bit ordering may be either Most Significant
83Bit (</big> MSB <big>) to Least Significant Bit (</big> LSB
84<big>) or</big> LSB <big>to</big> MSB. <big>Finally, the
85library does not support files in which the
86<i>BitsPerSample</i>, <i>Compression</i>,
87<i>MinSampleValue</i>, or <i>MaxSampleValue</i> fields are
88defined differently on a per-sample basis (in Rev. 6.0 the
89<i>Compression</i> tag is not defined on a per-sample basis,
90so this is immaterial).</big></p>
91</td>
92</table>
93<a name="DATA TYPES"></a>
94<h2>DATA TYPES</h2>
95<!-- INDENTATION -->
96<table width="100%" border=0 rules="none" frame="void"
97 cols="2" cellspacing="0" cellpadding="0">
98<tr valign="top" align="left">
99<td width="8%"></td>
100<td width="91%">
101<p><big>The library makes extensive use of C typedefs to
102promote portability. Two sets of typedefs are used, one for
103communication with clients of the library and one for
104internal data structures and parsing of the</big> TIFF
105<big>format. The following typedefs are exposed to users
106either through function definitions or through parameters
107passed through the varargs interfaces.</big></p></td>
108</table>
109<!-- TABS -->
110<table width="100%" border=0 rules="none" frame="void"
111 cols="3" cellspacing="0" cellpadding="0">
112<tr valign="top" align="left">
113<td width="15%"></td>
114<td width="46%">
115
116<p><big>typedef unsigned short uint16;</big></p>
117</td>
118<td width="38%">
119
120<p><big>16-bit unsigned integer</big></p>
121</td>
122<tr valign="top" align="left">
123<td width="15%"></td>
124<td width="46%">
125
126<p><big>typedef unsigned &lt;<i>thing</i>&gt;
127uint32;</big></p>
128</td>
129<td width="38%">
130
131<p><big>32-bit unsigned integer</big></p>
132</td>
133<tr valign="top" align="left">
134<td width="15%"></td>
135<td width="46%">
136
137<p><big>typedef unsigned int ttag_t;</big></p>
138</td>
139<td width="38%">
140
141<p><big>directory tag</big></p>
142</td>
143<tr valign="top" align="left">
144<td width="15%"></td>
145<td width="46%">
146
147<p><big>typedef uint16 tdir_t;</big></p>
148</td>
149<td width="38%">
150
151<p><big>directory index</big></p>
152</td>
153<tr valign="top" align="left">
154<td width="15%"></td>
155<td width="46%">
156
157<p><big>typedef uint16 tsample_t;</big></p>
158</td>
159<td width="38%">
160
161<p><big>sample number</big></p>
162</td>
163<tr valign="top" align="left">
164<td width="15%"></td>
165<td width="46%">
166
167<p><big>typedef uint32 tstrip_t;</big></p>
168</td>
169<td width="38%">
170
171<p><big>strip number</big></p>
172</td>
173<tr valign="top" align="left">
174<td width="15%"></td>
175<td width="46%">
176
177<p><big>typedef uint32 ttile_t;</big></p>
178</td>
179<td width="38%">
180
181<p><big>tile number</big></p>
182</td>
183<tr valign="top" align="left">
184<td width="15%"></td>
185<td width="46%">
186
187<p><big>typedef int32 tsize_t;</big></p>
188</td>
189<td width="38%">
190
191<p><big>i/o size in bytes</big></p>
192</td>
193<tr valign="top" align="left">
194<td width="15%"></td>
195<td width="46%">
196
197<p><big>typedef void* tdata_t;</big></p>
198</td>
199<td width="38%">
200
201<p><big>image data ref</big></p>
202</td>
203<tr valign="top" align="left">
204<td width="15%"></td>
205<td width="46%">
206
207<p><big>typedef void* thandle_t;</big></p>
208</td>
209<td width="38%">
210
211<p><big>client data handle</big></p>
212</td>
213<tr valign="top" align="left">
214<td width="15%"></td>
215<td width="46%">
216
217<p><big>typedef int32 toff_t;</big></p>
218</td>
219<td width="38%">
220
221<p><big>file offset</big></p>
222</td>
223</table>
224<!-- INDENTATION -->
225<table width="100%" border=0 rules="none" frame="void"
226 cols="2" cellspacing="0" cellpadding="0">
227<tr valign="top" align="left">
228<td width="8%"></td>
229<td width="91%">
230<p><big>Note that <i>tstrip_t</i>, <i>ttile_t</i>, and
231<i>tsize_t</i> are constrained to be no more than 32-bit
232quantities by 32-bit fields they are stored in in the</big>
233TIFF <big>image. Likewise <i>tsample_t</i> is limited by the
23416-bit field used to store the <i>SamplesPerPixel</i> tag.
235<i>tdir_t</i> constrains the maximum number of</big> IFDs
236<big>that may appear in an image and may be an arbitrary
237size (w/o penalty). <i>ttag_t</i> must be either int,
238unsigned int, pointer, or double because the library uses a
239varargs interface and</big> ANSI C <big>restricts the type
240of the parameter before an ellipsis to be a promoted type.
241<i>toff_t</i> is defined as int32 because TIFF file offsets
242are (unsigned) 32-bit quantities. A signed value is used
243because some interfaces return &minus;1 on error. Finally,
244note that user-specified data references are passed as
245opaque handles and only cast at the lowest layers where
246their type is presumed.</big></p>
247</td>
248</table>
249<a name="LIST OF ROUTINES"></a>
250<h2>LIST OF ROUTINES</h2>
251<!-- INDENTATION -->
252<table width="100%" border=0 rules="none" frame="void"
253 cols="2" cellspacing="0" cellpadding="0">
254<tr valign="top" align="left">
255<td width="8%"></td>
256<td width="91%">
257<p><big>The following routines are part of the library.
258Consult specific manual pages for details on their
259operation; on most systems doing &lsquo;&lsquo;man
260function-name&rsquo;&rsquo; will work.</big></p></td>
261</table>
262<!-- TABS -->
263
264<p><big><i>Name Description</i></big></p>
265<!-- TABS -->
266<table width="100%" border=0 rules="none" frame="void"
267 cols="3" cellspacing="0" cellpadding="0">
268<tr valign="top" align="left">
269<td width="8%"></td>
270<td width="23%">
271
272<p><big>TIFFCheckpointDirectory</big></p>
273</td>
274<td width="67%">
275
276<p><big>writes the current state of the directory</big></p>
277</td>
278<tr valign="top" align="left">
279<td width="8%"></td>
280<td width="23%">
281
282<p><big>TIFFCheckTile</big></p>
283</td>
284<td width="67%">
285
286<p><big>very x,y,z,sample is within image</big></p>
287</td>
288<tr valign="top" align="left">
289<td width="8%"></td>
290<td width="23%">
291
292<p><big>TIFFCIELabToRGBInit</big></p>
293</td>
294<td width="67%">
295
296<p><big>initialize CIE L*a*b* 1976 to RGB conversion
297state</big></p>
298</td>
299<tr valign="top" align="left">
300<td width="8%"></td>
301<td width="23%">
302
303<p><big>TIFFCIELabToXYZ</big></p>
304</td>
305<td width="67%">
306
307<p><big>perform CIE L*a*b* 1976 to CIE XYZ
308conversion</big></p>
309</td>
310<tr valign="top" align="left">
311<td width="8%"></td>
312<td width="23%">
313
314<p><big>TIFFClientOpen</big></p>
315</td>
316<td width="67%">
317
318<p><big>open a file for reading or writing</big></p>
319</td>
320<tr valign="top" align="left">
321<td width="8%"></td>
322<td width="23%">
323
324<p><big>TIFFClose</big></p>
325</td>
326<td width="67%">
327
328<p><big>close an open file</big></p>
329</td>
330<tr valign="top" align="left">
331<td width="8%"></td>
332<td width="23%">
333
334<p><big>TIFFComputeStrip</big></p>
335</td>
336<td width="67%">
337
338<p><big>return strip containing y,sample</big></p>
339</td>
340<tr valign="top" align="left">
341<td width="8%"></td>
342<td width="23%">
343
344<p><big>TIFFComputeTile</big></p>
345</td>
346<td width="67%">
347
348<p><big>return tile containing x,y,z,sample</big></p>
349</td>
350<tr valign="top" align="left">
351<td width="8%"></td>
352<td width="23%">
353
354<p><big>TIFFCurrentDirectory</big></p>
355</td>
356<td width="67%">
357
358<p><big>return index of current directory</big></p>
359</td>
360<tr valign="top" align="left">
361<td width="8%"></td>
362<td width="23%">
363
364<p><big>TIFFCurrentRow</big></p>
365</td>
366<td width="67%">
367
368<p><big>return index of current scanline</big></p>
369</td>
370<tr valign="top" align="left">
371<td width="8%"></td>
372<td width="23%">
373
374<p><big>TIFFCurrentStrip</big></p>
375</td>
376<td width="67%">
377
378<p><big>return index of current strip</big></p>
379</td>
380<tr valign="top" align="left">
381<td width="8%"></td>
382<td width="23%">
383
384<p><big>TIFFCurrentTile</big></p>
385</td>
386<td width="67%">
387
388<p><big>return index of current tile</big></p>
389</td>
390<tr valign="top" align="left">
391<td width="8%"></td>
392<td width="23%">
393
394<p><big>TIFFDataWidth</big></p>
395</td>
396<td width="67%">
397
398<p><big>return the size of TIFF data types</big></p>
399</td>
400<tr valign="top" align="left">
401<td width="8%"></td>
402<td width="23%">
403
404<p><big>TIFFError</big></p>
405</td>
406<td width="67%">
407
408<p><big>library error handler</big></p>
409</td>
410<tr valign="top" align="left">
411<td width="8%"></td>
412<td width="23%">
413
414<p><big>TIFFFdOpen</big></p>
415</td>
416<td width="67%">
417
418<p><big>open a file for reading or writing</big></p>
419</td>
420<tr valign="top" align="left">
421<td width="8%"></td>
422<td width="23%">
423
424<p><big>TIFFFileName</big></p>
425</td>
426<td width="67%">
427
428<p><big>return name of open file</big></p>
429</td>
430<tr valign="top" align="left">
431<td width="8%"></td>
432<td width="23%">
433
434<p><big>TIFFFileno</big></p>
435</td>
436<td width="67%">
437
438<p><big>return open file descriptor</big></p>
439</td>
440<tr valign="top" align="left">
441<td width="8%"></td>
442<td width="23%">
443
444<p><big>TIFFFindCODEC</big></p>
445</td>
446<td width="67%">
447
448<p><big>find standard codec for the specific
449scheme</big></p>
450</td>
451<tr valign="top" align="left">
452<td width="8%"></td>
453<td width="23%">
454
455<p><big>TIFFFlush</big></p>
456</td>
457<td width="67%">
458
459<p><big>flush all pending writes</big></p>
460</td>
461<tr valign="top" align="left">
462<td width="8%"></td>
463<td width="23%">
464
465<p><big>TIFFFlushData</big></p>
466</td>
467<td width="67%">
468
469<p><big>flush pending data writes</big></p>
470</td>
471<tr valign="top" align="left">
472<td width="8%"></td>
473<td width="23%">
474
475<p><big>TIFFGetBitRevTable</big></p>
476</td>
477<td width="67%">
478
479<p><big>return bit reversal table</big></p>
480</td>
481<tr valign="top" align="left">
482<td width="8%"></td>
483<td width="23%">
484
485<p><big>TIFFGetField</big></p>
486</td>
487<td width="67%">
488
489<p><big>return tag value in current directory</big></p>
490</td>
491<tr valign="top" align="left">
492<td width="8%"></td>
493<td width="23%">
494
495<p><big>TIFFGetFieldDefaulted</big></p>
496</td>
497<td width="67%">
498
499<p><big>return tag value in current directory</big></p>
500</td>
501<tr valign="top" align="left">
502<td width="8%"></td>
503<td width="23%">
504
505<p><big>TIFFGetMode</big></p>
506</td>
507<td width="67%">
508
509<p><big>return open file mode</big></p>
510</td>
511<tr valign="top" align="left">
512<td width="8%"></td>
513<td width="23%">
514
515<p><big>TIFFGetVersion</big></p>
516</td>
517<td width="67%">
518
519<p><big>return library version string</big></p>
520</td>
521<tr valign="top" align="left">
522<td width="8%"></td>
523<td width="23%">
524
525<p><big>TIFFIsCODECConfigured</big></p>
526</td>
527<td width="67%">
528
529<p><big>check, whether we have working codec</big></p>
530</td>
531<tr valign="top" align="left">
532<td width="8%"></td>
533<td width="23%">
534
535<p><big>TIFFIsMSB2LSB</big></p>
536</td>
537<td width="67%">
538
539<p><big>return true if image data is being
540returned</big></p>
541</td>
542<tr valign="top" align="left">
543<td width="8%"></td>
544<td width="23%"></td>
545<td width="67%">
546
547<p><big>with bit 0 as the most significant bit</big></p>
548</td>
549<tr valign="top" align="left">
550<td width="8%"></td>
551<td width="23%">
552
553<p><big>TIFFIsTiled</big></p>
554</td>
555<td width="67%">
556
557<p><big>return true if image data is tiled</big></p>
558</td>
559<tr valign="top" align="left">
560<td width="8%"></td>
561<td width="23%">
562
563<p><big>TIFFIsByteSwapped</big></p>
564</td>
565<td width="67%">
566
567<p><big>return true if image data is byte-swapped</big></p>
568</td>
569<tr valign="top" align="left">
570<td width="8%"></td>
571<td width="23%">
572
573<p><big>TIFFNumberOfStrips</big></p>
574</td>
575<td width="67%">
576
577<p><big>return number of strips in an image</big></p>
578</td>
579<tr valign="top" align="left">
580<td width="8%"></td>
581<td width="23%">
582
583<p><big>TIFFNumberOfTiles</big></p>
584</td>
585<td width="67%">
586
587<p><big>return number of tiles in an image</big></p>
588</td>
589<tr valign="top" align="left">
590<td width="8%"></td>
591<td width="23%">
592
593<p><big>TIFFOpen</big></p>
594</td>
595<td width="67%">
596
597<p><big>open a file for reading or writing</big></p>
598</td>
599<tr valign="top" align="left">
600<td width="8%"></td>
601<td width="23%">
602
603<p><big>TIFFPrintDirectory</big></p>
604</td>
605<td width="67%">
606
607<p><big>print description of the current
608directory</big></p>
609</td>
610<tr valign="top" align="left">
611<td width="8%"></td>
612<td width="23%">
613
614<p><big>TIFFReadBufferSetup</big></p>
615</td>
616<td width="67%">
617
618<p><big>specify i/o buffer for reading</big></p>
619</td>
620<tr valign="top" align="left">
621<td width="8%"></td>
622<td width="23%">
623
624<p><big>TIFFReadDirectory</big></p>
625</td>
626<td width="67%">
627
628<p><big>read the next directory</big></p>
629</td>
630<tr valign="top" align="left">
631<td width="8%"></td>
632<td width="23%">
633
634<p><big>TIFFReadEncodedStrip</big></p>
635</td>
636<td width="67%">
637
638<p><big>read and decode a strip of data</big></p>
639</td>
640<tr valign="top" align="left">
641<td width="8%"></td>
642<td width="23%">
643
644<p><big>TIFFReadEncodedTile</big></p>
645</td>
646<td width="67%">
647
648<p><big>read and decode a tile of data</big></p>
649</td>
650<tr valign="top" align="left">
651<td width="8%"></td>
652<td width="23%">
653
654<p><big>TIFFReadRawStrip</big></p>
655</td>
656<td width="67%">
657
658<p><big>read a raw strip of data</big></p>
659</td>
660<tr valign="top" align="left">
661<td width="8%"></td>
662<td width="23%">
663
664<p><big>TIFFReadRawTile</big></p>
665</td>
666<td width="67%">
667
668<p><big>read a raw tile of data</big></p>
669</td>
670<tr valign="top" align="left">
671<td width="8%"></td>
672<td width="23%">
673
674<p><big>TIFFReadRGBAImage</big></p>
675</td>
676<td width="67%">
677
678<p><big>read an image into a fixed format raster</big></p>
679</td>
680<tr valign="top" align="left">
681<td width="8%"></td>
682<td width="23%">
683
684<p><big>TIFFReadScanline</big></p>
685</td>
686<td width="67%">
687
688<p><big>read and decode a row of data</big></p>
689</td>
690<tr valign="top" align="left">
691<td width="8%"></td>
692<td width="23%">
693
694<p><big>TIFFReadTile</big></p>
695</td>
696<td width="67%">
697
698<p><big>read and decode a tile of data</big></p>
699</td>
700<tr valign="top" align="left">
701<td width="8%"></td>
702<td width="23%">
703
704<p><big>TIFFRegisterCODEC</big></p>
705</td>
706<td width="67%">
707
708<p><big>override standard codec for the specific
709scheme</big></p>
710</td>
711<tr valign="top" align="left">
712<td width="8%"></td>
713<td width="23%">
714
715<p><big>TIFFReverseBits</big></p>
716</td>
717<td width="67%">
718
719<p><big>reverse bits in an array of bytes</big></p>
720</td>
721<tr valign="top" align="left">
722<td width="8%"></td>
723<td width="23%">
724
725<p><big>TIFFRGBAImageBegin</big></p>
726</td>
727<td width="67%">
728
729<p><big>setup decoder state for TIFFRGBAImageGet</big></p>
730</td>
731<tr valign="top" align="left">
732<td width="8%"></td>
733<td width="23%">
734
735<p><big>TIFFRGBAImageEnd</big></p>
736</td>
737<td width="67%">
738
739<p><big>release TIFFRGBAImage decoder state</big></p>
740</td>
741<tr valign="top" align="left">
742<td width="8%"></td>
743<td width="23%">
744
745<p><big>TIFFRGBAImageGet</big></p>
746</td>
747<td width="67%">
748
749<p><big>read and decode an image</big></p>
750</td>
751<tr valign="top" align="left">
752<td width="8%"></td>
753<td width="23%">
754
755<p><big>TIFFRGBAImageOK</big></p>
756</td>
757<td width="67%">
758
759<p><big>is image readable by TIFFRGBAImageGet</big></p>
760</td>
761<tr valign="top" align="left">
762<td width="8%"></td>
763<td width="23%">
764
765<p><big>TIFFScanlineSize</big></p>
766</td>
767<td width="67%">
768
769<p><big>return size of a scanline</big></p>
770</td>
771<tr valign="top" align="left">
772<td width="8%"></td>
773<td width="23%">
774
775<p><big>TIFFSetDirectory</big></p>
776</td>
777<td width="67%">
778
779<p><big>set the current directory</big></p>
780</td>
781<tr valign="top" align="left">
782<td width="8%"></td>
783<td width="23%">
784
785<p><big>TIFFSetSubDirectory</big></p>
786</td>
787<td width="67%">
788
789<p><big>set the current directory</big></p>
790</td>
791<tr valign="top" align="left">
792<td width="8%"></td>
793<td width="23%">
794
795<p><big>TIFFSetErrorHandler</big></p>
796</td>
797<td width="67%">
798
799<p><big>set error handler function</big></p>
800</td>
801<tr valign="top" align="left">
802<td width="8%"></td>
803<td width="23%">
804
805<p><big>TIFFSetField</big></p>
806</td>
807<td width="67%">
808
809<p><big>set a tag&rsquo;s value in the current
810directory</big></p>
811</td>
812<tr valign="top" align="left">
813<td width="8%"></td>
814<td width="23%">
815
816<p><big>TIFFSetWarningHandler</big></p>
817</td>
818<td width="67%">
819
820<p><big>set warning handler function</big></p>
821</td>
822<tr valign="top" align="left">
823<td width="8%"></td>
824<td width="23%">
825
826<p><big>TIFFStripSize</big></p>
827</td>
828<td width="67%">
829
830<p><big>returns size of a strip</big></p>
831</td>
832<tr valign="top" align="left">
833<td width="8%"></td>
834<td width="23%">
835
836<p><big>TIFFRawStripSize</big></p>
837</td>
838<td width="67%">
839
840<p><big>returns the number of bytes in a raw
841strip</big></p>
842</td>
843<tr valign="top" align="left">
844<td width="8%"></td>
845<td width="23%">
846
847<p><big>TIFFSwabShort</big></p>
848</td>
849<td width="67%">
850
851<p><big>swap bytes of short</big></p>
852</td>
853<tr valign="top" align="left">
854<td width="8%"></td>
855<td width="23%">
856
857<p><big>TIFFSwabLong</big></p>
858</td>
859<td width="67%">
860
861<p><big>swap bytes of long</big></p>
862</td>
863<tr valign="top" align="left">
864<td width="8%"></td>
865<td width="23%">
866
867<p><big>TIFFSwabArrayOfShort</big></p>
868</td>
869<td width="67%">
870
871<p><big>swap bytes of an array of shorts</big></p>
872</td>
873<tr valign="top" align="left">
874<td width="8%"></td>
875<td width="23%">
876
877<p><big>TIFFSwabArrayOfLong</big></p>
878</td>
879<td width="67%">
880
881<p><big>swap bytes of an array of longs</big></p>
882</td>
883<tr valign="top" align="left">
884<td width="8%"></td>
885<td width="23%">
886
887<p><big>TIFFTileRowSize</big></p>
888</td>
889<td width="67%">
890
891<p><big>return size of a row in a tile</big></p>
892</td>
893<tr valign="top" align="left">
894<td width="8%"></td>
895<td width="23%">
896
897<p><big>TIFFTileSize</big></p>
898</td>
899<td width="67%">
900
901<p><big>return size of a tile</big></p>
902</td>
903<tr valign="top" align="left">
904<td width="8%"></td>
905<td width="23%">
906
907<p><big>TIFFUnRegisterCODEC</big></p>
908</td>
909<td width="67%">
910
911<p><big>unregisters the codec</big></p>
912</td>
913<tr valign="top" align="left">
914<td width="8%"></td>
915<td width="23%">
916
917<p><big>TIFFVGetField</big></p>
918</td>
919<td width="67%">
920
921<p><big>return tag value in current directory</big></p>
922</td>
923<tr valign="top" align="left">
924<td width="8%"></td>
925<td width="23%">
926
927<p><big>TIFFVGetFieldDefaulted</big></p>
928</td>
929<td width="67%">
930
931<p><big>return tag value in current directory</big></p>
932</td>
933<tr valign="top" align="left">
934<td width="8%"></td>
935<td width="23%">
936
937<p><big>TIFFVSetField</big></p>
938</td>
939<td width="67%">
940
941<p><big>set a tag&rsquo;s value in the current
942directory</big></p>
943</td>
944<tr valign="top" align="left">
945<td width="8%"></td>
946<td width="23%">
947
948<p><big>TIFFVStripSize</big></p>
949</td>
950<td width="67%">
951
952<p><big>returns the number of bytes in a strip</big></p>
953</td>
954<tr valign="top" align="left">
955<td width="8%"></td>
956<td width="23%">
957
958<p><big>TIFFWarning</big></p>
959</td>
960<td width="67%">
961
962<p><big>library warning handler</big></p>
963</td>
964<tr valign="top" align="left">
965<td width="8%"></td>
966<td width="23%">
967
968<p><big>TIFFWriteDirectory</big></p>
969</td>
970<td width="67%">
971
972<p><big>write the current directory</big></p>
973</td>
974<tr valign="top" align="left">
975<td width="8%"></td>
976<td width="23%">
977
978<p><big>TIFFWriteEncodedStrip</big></p>
979</td>
980<td width="67%">
981
982<p><big>compress and write a strip of data</big></p>
983</td>
984<tr valign="top" align="left">
985<td width="8%"></td>
986<td width="23%">
987
988<p><big>TIFFWriteEncodedTile</big></p>
989</td>
990<td width="67%">
991
992<p><big>compress and write a tile of data</big></p>
993</td>
994<tr valign="top" align="left">
995<td width="8%"></td>
996<td width="23%">
997
998<p><big>TIFFWriteRawStrip</big></p>
999</td>
1000<td width="67%">
1001
1002<p><big>write a raw strip of data</big></p>
1003</td>
1004<tr valign="top" align="left">
1005<td width="8%"></td>
1006<td width="23%">
1007
1008<p><big>TIFFWriteRawTile</big></p>
1009</td>
1010<td width="67%">
1011
1012<p><big>write a raw tile of data</big></p>
1013</td>
1014<tr valign="top" align="left">
1015<td width="8%"></td>
1016<td width="23%">
1017
1018<p><big>TIFFWriteScanline</big></p>
1019</td>
1020<td width="67%">
1021
1022<p><big>write a scanline of data</big></p>
1023</td>
1024<tr valign="top" align="left">
1025<td width="8%"></td>
1026<td width="23%">
1027
1028<p><big>TIFFWriteTile</big></p>
1029</td>
1030<td width="67%">
1031
1032<p><big>compress and write a tile of data</big></p>
1033</td>
1034<tr valign="top" align="left">
1035<td width="8%"></td>
1036<td width="23%">
1037
1038<p><big>TIFFXYZToRGB</big></p>
1039</td>
1040<td width="67%">
1041
1042<p><big>perform CIE XYZ to RGB conversion</big></p>
1043</td>
1044<tr valign="top" align="left">
1045<td width="8%"></td>
1046<td width="23%">
1047
1048<p><big>TIFFYCbCrToRGBInit</big></p>
1049</td>
1050<td width="67%">
1051
1052<p><big>initialize YCbCr to RGB conversion state</big></p>
1053</td>
1054<tr valign="top" align="left">
1055<td width="8%"></td>
1056<td width="23%">
1057
1058<p><big>TIFFYCbCrtoRGB</big></p>
1059</td>
1060<td width="67%">
1061
1062<p><big>perform YCbCr to RGB conversion</big></p>
1063</td>
1064</table>
1065<!-- INDENTATION -->
1066<table width="100%" border=0 rules="none" frame="void"
1067 cols="2" cellspacing="0" cellpadding="0">
1068<tr valign="top" align="left">
1069<td width="8%"></td>
1070<td width="91%">
1071<p><big>Auxiliary functions:</big></p></td>
1072</table>
1073<!-- TABS -->
1074<table width="100%" border=0 rules="none" frame="void"
1075 cols="3" cellspacing="0" cellpadding="0">
1076<tr valign="top" align="left">
1077<td width="8%"></td>
1078<td width="23%">
1079
1080<p><big>_TIFFfree</big></p>
1081</td>
1082<td width="67%">
1083
1084<p><big>free memory buffer</big></p>
1085</td>
1086<tr valign="top" align="left">
1087<td width="8%"></td>
1088<td width="23%">
1089
1090<p><big>_TIFFmalloc</big></p>
1091</td>
1092<td width="67%">
1093
1094<p><big>dynamically allocate memory buffer</big></p>
1095</td>
1096<tr valign="top" align="left">
1097<td width="8%"></td>
1098<td width="23%">
1099
1100<p><big>_TIFFmemcmp</big></p>
1101</td>
1102<td width="67%">
1103
1104<p><big>compare contents of the memory buffers</big></p>
1105</td>
1106<tr valign="top" align="left">
1107<td width="8%"></td>
1108<td width="23%">
1109
1110<p><big>_TIFFmemcpy</big></p>
1111</td>
1112<td width="67%">
1113
1114<p><big>copy contents of the one buffer to
1115another</big></p>
1116</td>
1117<tr valign="top" align="left">
1118<td width="8%"></td>
1119<td width="23%">
1120
1121<p><big>_TIFFmemset</big></p>
1122</td>
1123<td width="67%">
1124
1125<p><big>fill memory buffer with a constant byte</big></p>
1126</td>
1127<tr valign="top" align="left">
1128<td width="8%"></td>
1129<td width="23%">
1130
1131<p><big>_TIFFrealloc</big></p>
1132</td>
1133<td width="67%">
1134
1135<p><big>dynamically reallocate memory buffer</big></p>
1136</td>
1137</table>
1138<a name="TAG USAGE"></a>
1139<h2>TAG USAGE</h2>
1140<!-- INDENTATION -->
1141<table width="100%" border=0 rules="none" frame="void"
1142 cols="2" cellspacing="0" cellpadding="0">
1143<tr valign="top" align="left">
1144<td width="8%"></td>
1145<td width="91%">
1146<p><big>The table below lists the</big> TIFF <big>tags that
1147are recognized and handled by the library. If no use is
1148indicated in the table, then the library reads and writes
1149the tag, but does not use it internally. Note that some tags
1150are meaningful only when a particular compression scheme is
1151being used; e.g. <i>Group3Options</i> is only useful if
1152<i>Compression</i> is set to</big> CCITT <big>Group 3
1153encoding. Tags of this sort are considered
1154<i>codec-specific</i> tags and the library does not
1155recognize them except when the <i>Compression</i> tag has
1156been previously set to the relevant compression
1157scheme.</big></p>
1158<!-- INDENTATION -->
1159<pre><big><i>Tag Name Value R/W Library Use/Notes
1160</i></big></pre>
1161</td>
1162</table>
1163<!-- TABS -->
1164
1165<table width="100%" border=0 rules="none" frame="void"
1166 cols="5" cellspacing="0" cellpadding="0">
1167<tr valign="top" align="left">
1168<td width="8%"></td>
1169<td width="21%">
1170
1171<p><big>Artist</big></p>
1172</td>
1173<td width="8%"></td>
1174<td width="6%">
1175
1176<p><big>315</big></p>
1177</td>
1178<td width="53%">
1179
1180<p><big>R/W</big></p>
1181</td>
1182<tr valign="top" align="left">
1183<td width="8%"></td>
1184<td width="21%">
1185
1186<p><big>BadFaxLines</big></p>
1187</td>
1188<td width="8%"></td>
1189<td width="6%">
1190
1191<p><big>326</big></p>
1192</td>
1193<td width="53%">
1194
1195<p><big>R/W</big></p>
1196</td>
1197<tr valign="top" align="left">
1198<td width="8%"></td>
1199<td width="21%">
1200
1201<p><big>BitsPerSample</big></p>
1202</td>
1203<td width="8%"></td>
1204<td width="6%">
1205
1206<p><big>258</big></p>
1207</td>
1208<td width="53%">
1209
1210<p><big>R/W</big></p>
1211</td>
1212<tr valign="top" align="left">
1213<td width="8%"></td>
1214<td width="21%"></td>
1215<td width="8%"></td>
1216<td width="6%"></td>
1217<td width="53%">
1218
1219<p><big>lots</big></p>
1220</td>
1221<tr valign="top" align="left">
1222<td width="8%"></td>
1223<td width="21%">
1224
1225<p><big>CellLength</big></p>
1226</td>
1227<td width="8%"></td>
1228<td width="6%">
1229
1230<p><big>265</big></p>
1231</td>
1232<td width="53%">
1233</td>
1234<tr valign="top" align="left">
1235<td width="8%"></td>
1236<td width="21%"></td>
1237<td width="8%"></td>
1238<td width="6%"></td>
1239<td width="53%">
1240
1241<p><big>parsed but ignored</big></p>
1242</td>
1243<tr valign="top" align="left">
1244<td width="8%"></td>
1245<td width="21%">
1246
1247<p><big>CellWidth</big></p>
1248</td>
1249<td width="8%"></td>
1250<td width="6%">
1251
1252<p><big>264</big></p>
1253</td>
1254<td width="53%">
1255</td>
1256<tr valign="top" align="left">
1257<td width="8%"></td>
1258<td width="21%"></td>
1259<td width="8%"></td>
1260<td width="6%"></td>
1261<td width="53%">
1262
1263<p><big>parsed but ignored</big></p>
1264</td>
1265<tr valign="top" align="left">
1266<td width="8%"></td>
1267<td width="21%">
1268
1269<p><big>CleanFaxData</big></p>
1270</td>
1271<td width="8%"></td>
1272<td width="6%">
1273
1274<p><big>327</big></p>
1275</td>
1276<td width="53%">
1277
1278<p><big>R/W</big></p>
1279</td>
1280<tr valign="top" align="left">
1281<td width="8%"></td>
1282<td width="21%">
1283
1284<p><big>ColorMap</big></p>
1285</td>
1286<td width="8%"></td>
1287<td width="6%">
1288
1289<p><big>320</big></p>
1290</td>
1291<td width="53%">
1292
1293<p><big>R/W</big></p>
1294</td>
1295<tr valign="top" align="left">
1296<td width="8%"></td>
1297<td width="21%">
1298
1299<p><big>ColorResponseUnit</big></p>
1300</td>
1301<td width="8%"></td>
1302<td width="6%">
1303
1304<p><big>300</big></p>
1305</td>
1306<td width="53%">
1307</td>
1308<tr valign="top" align="left">
1309<td width="8%"></td>
1310<td width="21%"></td>
1311<td width="8%"></td>
1312<td width="6%"></td>
1313<td width="53%">
1314
1315<p><big>parsed but ignored</big></p>
1316</td>
1317<tr valign="top" align="left">
1318<td width="8%"></td>
1319<td width="21%">
1320
1321<p><big>Compression</big></p>
1322</td>
1323<td width="8%"></td>
1324<td width="6%">
1325
1326<p><big>259</big></p>
1327</td>
1328<td width="53%">
1329
1330<p><big>R/W</big></p>
1331</td>
1332<tr valign="top" align="left">
1333<td width="8%"></td>
1334<td width="21%"></td>
1335<td width="8%"></td>
1336<td width="6%"></td>
1337<td width="53%">
1338
1339<p><big>choosing codec</big></p>
1340</td>
1341<tr valign="top" align="left">
1342<td width="8%"></td>
1343<td width="21%">
1344
1345<p><big>ConsecutiveBadFaxLines</big></p>
1346</td>
1347<td width="8%"></td>
1348<td width="6%">
1349
1350<p><big>328</big></p>
1351</td>
1352<td width="53%">
1353
1354<p><big>R/W</big></p>
1355</td>
1356</table>
1357<!-- INDENTATION -->
1358<table width="100%" border=0 rules="none" frame="void"
1359 cols="2" cellspacing="0" cellpadding="0">
1360<tr valign="top" align="left">
1361<td width="8%"></td>
1362<td width="91%">
1363<p><big>Copyright 33432 R/W</big></p></td>
1364</table>
1365<!-- TABS -->
1366<table width="100%" border=0 rules="none" frame="void"
1367 cols="5" cellspacing="0" cellpadding="0">
1368<tr valign="top" align="left">
1369<td width="8%"></td>
1370<td width="21%">
1371
1372<p><big>DataType</big></p>
1373</td>
1374<td width="8%"></td>
1375<td width="6%">
1376
1377<p><big>32996</big></p>
1378</td>
1379<td width="53%">
1380
1381<p><big>R</big></p>
1382</td>
1383<tr valign="top" align="left">
1384<td width="8%"></td>
1385<td width="21%"></td>
1386<td width="8%"></td>
1387<td width="6%"></td>
1388<td width="53%">
1389
1390<p><big>obsoleted by SampleFormat tag</big></p>
1391</td>
1392<tr valign="top" align="left">
1393<td width="8%"></td>
1394<td width="21%">
1395
1396<p><big>DateTime</big></p>
1397</td>
1398<td width="8%"></td>
1399<td width="6%">
1400
1401<p><big>306</big></p>
1402</td>
1403<td width="53%">
1404
1405<p><big>R/W</big></p>
1406</td>
1407<tr valign="top" align="left">
1408<td width="8%"></td>
1409<td width="21%">
1410
1411<p><big>DocumentName</big></p>
1412</td>
1413<td width="8%"></td>
1414<td width="6%">
1415
1416<p><big>269</big></p>
1417</td>
1418<td width="53%">
1419
1420<p><big>R/W</big></p>
1421</td>
1422<tr valign="top" align="left">
1423<td width="8%"></td>
1424<td width="21%">
1425
1426<p><big>DotRange</big></p>
1427</td>
1428<td width="8%"></td>
1429<td width="6%">
1430
1431<p><big>336</big></p>
1432</td>
1433<td width="53%">
1434
1435<p><big>R/W</big></p>
1436</td>
1437<tr valign="top" align="left">
1438<td width="8%"></td>
1439<td width="21%">
1440
1441<p><big>ExtraSamples</big></p>
1442</td>
1443<td width="8%"></td>
1444<td width="6%">
1445
1446<p><big>338</big></p>
1447</td>
1448<td width="53%">
1449
1450<p><big>R/W</big></p>
1451</td>
1452<tr valign="top" align="left">
1453<td width="8%"></td>
1454<td width="21%"></td>
1455<td width="8%"></td>
1456<td width="6%"></td>
1457<td width="53%">
1458
1459<p><big>lots</big></p>
1460</td>
1461<tr valign="top" align="left">
1462<td width="8%"></td>
1463<td width="21%">
1464
1465<p><big>FaxRecvParams</big></p>
1466</td>
1467<td width="8%"></td>
1468<td width="6%">
1469
1470<p><big>34908</big></p>
1471</td>
1472<td width="53%">
1473
1474<p><big>R/W</big></p>
1475</td>
1476<tr valign="top" align="left">
1477<td width="8%"></td>
1478<td width="21%">
1479
1480<p><big>FaxSubAddress</big></p>
1481</td>
1482<td width="8%"></td>
1483<td width="6%">
1484
1485<p><big>34909</big></p>
1486</td>
1487<td width="53%">
1488
1489<p><big>R/W</big></p>
1490</td>
1491<tr valign="top" align="left">
1492<td width="8%"></td>
1493<td width="21%">
1494
1495<p><big>FaxRecvTime</big></p>
1496</td>
1497<td width="8%"></td>
1498<td width="6%">
1499
1500<p><big>34910</big></p>
1501</td>
1502<td width="53%">
1503
1504<p><big>R/W</big></p>
1505</td>
1506<tr valign="top" align="left">
1507<td width="8%"></td>
1508<td width="21%">
1509
1510<p><big>FillOrder</big></p>
1511</td>
1512<td width="8%"></td>
1513<td width="6%">
1514
1515<p><big>266</big></p>
1516</td>
1517<td width="53%">
1518
1519<p><big>R/W</big></p>
1520</td>
1521<tr valign="top" align="left">
1522<td width="8%"></td>
1523<td width="21%"></td>
1524<td width="8%"></td>
1525<td width="6%"></td>
1526<td width="53%">
1527
1528<p><big>control bit order</big></p>
1529</td>
1530<tr valign="top" align="left">
1531<td width="8%"></td>
1532<td width="21%">
1533
1534<p><big>FreeByteCounts</big></p>
1535</td>
1536<td width="8%"></td>
1537<td width="6%">
1538
1539<p><big>289</big></p>
1540</td>
1541<td width="53%">
1542</td>
1543<tr valign="top" align="left">
1544<td width="8%"></td>
1545<td width="21%"></td>
1546<td width="8%"></td>
1547<td width="6%"></td>
1548<td width="53%">
1549
1550<p><big>parsed but ignored</big></p>
1551</td>
1552<tr valign="top" align="left">
1553<td width="8%"></td>
1554<td width="21%">
1555
1556<p><big>FreeOffsets</big></p>
1557</td>
1558<td width="8%"></td>
1559<td width="6%">
1560
1561<p><big>288</big></p>
1562</td>
1563<td width="53%">
1564</td>
1565<tr valign="top" align="left">
1566<td width="8%"></td>
1567<td width="21%"></td>
1568<td width="8%"></td>
1569<td width="6%"></td>
1570<td width="53%">
1571
1572<p><big>parsed but ignored</big></p>
1573</td>
1574<tr valign="top" align="left">
1575<td width="8%"></td>
1576<td width="21%">
1577
1578<p><big>GrayResponseCurve</big></p>
1579</td>
1580<td width="8%"></td>
1581<td width="6%">
1582
1583<p><big>291</big></p>
1584</td>
1585<td width="53%">
1586</td>
1587<tr valign="top" align="left">
1588<td width="8%"></td>
1589<td width="21%"></td>
1590<td width="8%"></td>
1591<td width="6%"></td>
1592<td width="53%">
1593
1594<p><big>parsed but ignored</big></p>
1595</td>
1596<tr valign="top" align="left">
1597<td width="8%"></td>
1598<td width="21%">
1599
1600<p><big>GrayResponseUnit</big></p>
1601</td>
1602<td width="8%"></td>
1603<td width="6%">
1604
1605<p><big>290</big></p>
1606</td>
1607<td width="53%">
1608</td>
1609<tr valign="top" align="left">
1610<td width="8%"></td>
1611<td width="21%"></td>
1612<td width="8%"></td>
1613<td width="6%"></td>
1614<td width="53%">
1615
1616<p><big>parsed but ignored</big></p>
1617</td>
1618<tr valign="top" align="left">
1619<td width="8%"></td>
1620<td width="21%">
1621
1622<p><big>Group3Options</big></p>
1623</td>
1624<td width="8%"></td>
1625<td width="6%">
1626
1627<p><big>292</big></p>
1628</td>
1629<td width="53%">
1630
1631<p><big>R/W</big></p>
1632</td>
1633<tr valign="top" align="left">
1634<td width="8%"></td>
1635<td width="21%"></td>
1636<td width="8%"></td>
1637<td width="6%"></td>
1638<td width="53%">
1639
1640<p><big>used by Group 3 codec</big></p>
1641</td>
1642<tr valign="top" align="left">
1643<td width="8%"></td>
1644<td width="21%">
1645
1646<p><big>Group4Options</big></p>
1647</td>
1648<td width="8%"></td>
1649<td width="6%">
1650
1651<p><big>293</big></p>
1652</td>
1653<td width="53%">
1654
1655<p><big>R/W</big></p>
1656</td>
1657<tr valign="top" align="left">
1658<td width="8%"></td>
1659<td width="21%">
1660
1661<p><big>HostComputer</big></p>
1662</td>
1663<td width="8%"></td>
1664<td width="6%">
1665
1666<p><big>316</big></p>
1667</td>
1668<td width="53%">
1669
1670<p><big>R/W</big></p>
1671</td>
1672<tr valign="top" align="left">
1673<td width="8%"></td>
1674<td width="21%">
1675
1676<p><big>ImageDepth</big></p>
1677</td>
1678<td width="8%"></td>
1679<td width="6%">
1680
1681<p><big>32997</big></p>
1682</td>
1683<td width="53%">
1684
1685<p><big>R/W</big></p>
1686</td>
1687<tr valign="top" align="left">
1688<td width="8%"></td>
1689<td width="21%"></td>
1690<td width="8%"></td>
1691<td width="6%"></td>
1692<td width="53%">
1693
1694<p><big>tile/strip calculations</big></p>
1695</td>
1696<tr valign="top" align="left">
1697<td width="8%"></td>
1698<td width="21%">
1699
1700<p><big>ImageDescription</big></p>
1701</td>
1702<td width="8%"></td>
1703<td width="6%">
1704
1705<p><big>270</big></p>
1706</td>
1707<td width="53%">
1708
1709<p><big>R/W</big></p>
1710</td>
1711<tr valign="top" align="left">
1712<td width="8%"></td>
1713<td width="21%">
1714
1715<p><big>ImageLength</big></p>
1716</td>
1717<td width="8%"></td>
1718<td width="6%">
1719
1720<p><big>257</big></p>
1721</td>
1722<td width="53%">
1723
1724<p><big>R/W</big></p>
1725</td>
1726<tr valign="top" align="left">
1727<td width="8%"></td>
1728<td width="21%"></td>
1729<td width="8%"></td>
1730<td width="6%"></td>
1731<td width="53%">
1732
1733<p><big>lots</big></p>
1734</td>
1735<tr valign="top" align="left">
1736<td width="8%"></td>
1737<td width="21%">
1738
1739<p><big>ImageWidth</big></p>
1740</td>
1741<td width="8%"></td>
1742<td width="6%">
1743
1744<p><big>256</big></p>
1745</td>
1746<td width="53%">
1747
1748<p><big>R/W</big></p>
1749</td>
1750<tr valign="top" align="left">
1751<td width="8%"></td>
1752<td width="21%"></td>
1753<td width="8%"></td>
1754<td width="6%"></td>
1755<td width="53%">
1756
1757<p><big>lots</big></p>
1758</td>
1759<tr valign="top" align="left">
1760<td width="8%"></td>
1761<td width="21%">
1762
1763<p><big>InkNames</big></p>
1764</td>
1765<td width="8%"></td>
1766<td width="6%">
1767
1768<p><big>333</big></p>
1769</td>
1770<td width="53%">
1771
1772<p><big>R/W</big></p>
1773</td>
1774<tr valign="top" align="left">
1775<td width="8%"></td>
1776<td width="21%">
1777
1778<p><big>InkSet</big></p>
1779</td>
1780<td width="8%"></td>
1781<td width="6%">
1782
1783<p><big>332</big></p>
1784</td>
1785<td width="53%">
1786
1787<p><big>R/W</big></p>
1788</td>
1789<tr valign="top" align="left">
1790<td width="8%"></td>
1791<td width="21%">
1792
1793<p><big>JPEGTables</big></p>
1794</td>
1795<td width="8%"></td>
1796<td width="6%">
1797
1798<p><big>347</big></p>
1799</td>
1800<td width="53%">
1801
1802<p><big>R/W</big></p>
1803</td>
1804<tr valign="top" align="left">
1805<td width="8%"></td>
1806<td width="21%"></td>
1807<td width="8%"></td>
1808<td width="6%"></td>
1809<td width="53%">
1810
1811<p><big>used by JPEG codec</big></p>
1812</td>
1813<tr valign="top" align="left">
1814<td width="8%"></td>
1815<td width="21%">
1816
1817<p><big>Make</big></p>
1818</td>
1819<td width="8%"></td>
1820<td width="6%">
1821
1822<p><big>271</big></p>
1823</td>
1824<td width="53%">
1825
1826<p><big>R/W</big></p>
1827</td>
1828<tr valign="top" align="left">
1829<td width="8%"></td>
1830<td width="21%">
1831
1832<p><big>Matteing</big></p>
1833</td>
1834<td width="8%"></td>
1835<td width="6%">
1836
1837<p><big>32995</big></p>
1838</td>
1839<td width="53%">
1840
1841<p><big>R</big></p>
1842</td>
1843<tr valign="top" align="left">
1844<td width="8%"></td>
1845<td width="21%"></td>
1846<td width="8%"></td>
1847<td width="6%"></td>
1848<td width="53%">
1849
1850<p><big>obsoleted by ExtraSamples tag</big></p>
1851</td>
1852<tr valign="top" align="left">
1853<td width="8%"></td>
1854<td width="21%">
1855
1856<p><big>MaxSampleValue</big></p>
1857</td>
1858<td width="8%"></td>
1859<td width="6%">
1860
1861<p><big>281</big></p>
1862</td>
1863<td width="53%">
1864
1865<p><big>R/W</big></p>
1866</td>
1867<tr valign="top" align="left">
1868<td width="8%"></td>
1869<td width="21%">
1870
1871<p><big>MinSampleValue</big></p>
1872</td>
1873<td width="8%"></td>
1874<td width="6%">
1875
1876<p><big>280</big></p>
1877</td>
1878<td width="53%">
1879
1880<p><big>R/W</big></p>
1881</td>
1882<tr valign="top" align="left">
1883<td width="8%"></td>
1884<td width="21%">
1885
1886<p><big>Model</big></p>
1887</td>
1888<td width="8%"></td>
1889<td width="6%">
1890
1891<p><big>272</big></p>
1892</td>
1893<td width="53%">
1894
1895<p><big>R/W</big></p>
1896</td>
1897<tr valign="top" align="left">
1898<td width="8%"></td>
1899<td width="21%">
1900
1901<p><big>NewSubFileType</big></p>
1902</td>
1903<td width="8%"></td>
1904<td width="6%">
1905
1906<p><big>254</big></p>
1907</td>
1908<td width="53%">
1909
1910<p><big>R/W</big></p>
1911</td>
1912<tr valign="top" align="left">
1913<td width="8%"></td>
1914<td width="21%"></td>
1915<td width="8%"></td>
1916<td width="6%"></td>
1917<td width="53%">
1918
1919<p><big>called SubFileType in spec</big></p>
1920</td>
1921<tr valign="top" align="left">
1922<td width="8%"></td>
1923<td width="21%">
1924
1925<p><big>NumberOfInks</big></p>
1926</td>
1927<td width="8%"></td>
1928<td width="6%">
1929
1930<p><big>334</big></p>
1931</td>
1932<td width="53%">
1933
1934<p><big>R/W</big></p>
1935</td>
1936<tr valign="top" align="left">
1937<td width="8%"></td>
1938<td width="21%">
1939
1940<p><big>Orientation</big></p>
1941</td>
1942<td width="8%"></td>
1943<td width="6%">
1944
1945<p><big>274</big></p>
1946</td>
1947<td width="53%">
1948
1949<p><big>R/W</big></p>
1950</td>
1951<tr valign="top" align="left">
1952<td width="8%"></td>
1953<td width="21%">
1954
1955<p><big>PageName</big></p>
1956</td>
1957<td width="8%"></td>
1958<td width="6%">
1959
1960<p><big>285</big></p>
1961</td>
1962<td width="53%">
1963
1964<p><big>R/W</big></p>
1965</td>
1966<tr valign="top" align="left">
1967<td width="8%"></td>
1968<td width="21%">
1969
1970<p><big>PageNumber</big></p>
1971</td>
1972<td width="8%"></td>
1973<td width="6%">
1974
1975<p><big>297</big></p>
1976</td>
1977<td width="53%">
1978
1979<p><big>R/W</big></p>
1980</td>
1981<tr valign="top" align="left">
1982<td width="8%"></td>
1983<td width="21%">
1984
1985<p><big>PhotometricInterpretation</big></p>
1986</td>
1987<td width="8%"></td>
1988<td width="6%"></td>
1989<td width="53%">
1990
1991<p><big>262</big></p>
1992</td>
1993<tr valign="top" align="left">
1994<td width="8%"></td>
1995<td width="21%"></td>
1996<td width="8%"></td>
1997<td width="6%"></td>
1998<td width="53%">
1999
2000<p><big>R/Wused by Group 3 and JPEG codecs</big></p>
2001</td>
2002<tr valign="top" align="left">
2003<td width="8%"></td>
2004<td width="21%">
2005
2006<p><big>PlanarConfiguration</big></p>
2007</td>
2008<td width="8%"></td>
2009<td width="6%">
2010
2011<p><big>284</big></p>
2012</td>
2013<td width="53%">
2014
2015<p><big>R/W</big></p>
2016</td>
2017<tr valign="top" align="left">
2018<td width="8%"></td>
2019<td width="21%"></td>
2020<td width="8%"></td>
2021<td width="6%"></td>
2022<td width="53%">
2023
2024<p><big>data i/o</big></p>
2025</td>
2026<tr valign="top" align="left">
2027<td width="8%"></td>
2028<td width="21%">
2029
2030<p><big>Predictor</big></p>
2031</td>
2032<td width="8%"></td>
2033<td width="6%">
2034
2035<p><big>317</big></p>
2036</td>
2037<td width="53%">
2038
2039<p><big>R/W</big></p>
2040</td>
2041<tr valign="top" align="left">
2042<td width="8%"></td>
2043<td width="21%"></td>
2044<td width="8%"></td>
2045<td width="6%"></td>
2046<td width="53%">
2047
2048<p><big>used by LZW and Deflate codecs</big></p>
2049</td>
2050<tr valign="top" align="left">
2051<td width="8%"></td>
2052<td width="21%">
2053
2054<p><big>PrimaryChromacities</big></p>
2055</td>
2056<td width="8%"></td>
2057<td width="6%">
2058
2059<p><big>319</big></p>
2060</td>
2061<td width="53%">
2062
2063<p><big>R/W</big></p>
2064</td>
2065<tr valign="top" align="left">
2066<td width="8%"></td>
2067<td width="21%">
2068
2069<p><big>ReferenceBlackWhite</big></p>
2070</td>
2071<td width="8%"></td>
2072<td width="6%">
2073
2074<p><big>532</big></p>
2075</td>
2076<td width="53%">
2077
2078<p><big>R/W</big></p>
2079</td>
2080<tr valign="top" align="left">
2081<td width="8%"></td>
2082<td width="21%">
2083
2084<p><big>ResolutionUnit</big></p>
2085</td>
2086<td width="8%"></td>
2087<td width="6%">
2088
2089<p><big>296</big></p>
2090</td>
2091<td width="53%">
2092
2093<p><big>R/W</big></p>
2094</td>
2095<tr valign="top" align="left">
2096<td width="8%"></td>
2097<td width="21%"></td>
2098<td width="8%"></td>
2099<td width="6%"></td>
2100<td width="53%">
2101
2102<p><big>used by Group 3 codec</big></p>
2103</td>
2104<tr valign="top" align="left">
2105<td width="8%"></td>
2106<td width="21%">
2107
2108<p><big>RowsPerStrip</big></p>
2109</td>
2110<td width="8%"></td>
2111<td width="6%">
2112
2113<p><big>278</big></p>
2114</td>
2115<td width="53%">
2116
2117<p><big>R/W</big></p>
2118</td>
2119<tr valign="top" align="left">
2120<td width="8%"></td>
2121<td width="21%"></td>
2122<td width="8%"></td>
2123<td width="6%"></td>
2124<td width="53%">
2125
2126<p><big>data i/o</big></p>
2127</td>
2128<tr valign="top" align="left">
2129<td width="8%"></td>
2130<td width="21%">
2131
2132<p><big>SampleFormat</big></p>
2133</td>
2134<td width="8%"></td>
2135<td width="6%">
2136
2137<p><big>339</big></p>
2138</td>
2139<td width="53%">
2140
2141<p><big>R/W</big></p>
2142</td>
2143<tr valign="top" align="left">
2144<td width="8%"></td>
2145<td width="21%">
2146
2147<p><big>SamplesPerPixel</big></p>
2148</td>
2149<td width="8%"></td>
2150<td width="6%">
2151
2152<p><big>277</big></p>
2153</td>
2154<td width="53%">
2155
2156<p><big>R/W</big></p>
2157</td>
2158<tr valign="top" align="left">
2159<td width="8%"></td>
2160<td width="21%"></td>
2161<td width="8%"></td>
2162<td width="6%"></td>
2163<td width="53%">
2164
2165<p><big>lots</big></p>
2166</td>
2167<tr valign="top" align="left">
2168<td width="8%"></td>
2169<td width="21%">
2170
2171<p><big>SMinSampleValue</big></p>
2172</td>
2173<td width="8%"></td>
2174<td width="6%">
2175
2176<p><big>340</big></p>
2177</td>
2178<td width="53%">
2179
2180<p><big>R/W</big></p>
2181</td>
2182<tr valign="top" align="left">
2183<td width="8%"></td>
2184<td width="21%">
2185
2186<p><big>SMaxSampleValue</big></p>
2187</td>
2188<td width="8%"></td>
2189<td width="6%">
2190
2191<p><big>341</big></p>
2192</td>
2193<td width="53%">
2194
2195<p><big>R/W</big></p>
2196</td>
2197<tr valign="top" align="left">
2198<td width="8%"></td>
2199<td width="21%">
2200
2201<p><big>Software</big></p>
2202</td>
2203<td width="8%"></td>
2204<td width="6%">
2205
2206<p><big>305</big></p>
2207</td>
2208<td width="53%">
2209
2210<p><big>R/W</big></p>
2211</td>
2212<tr valign="top" align="left">
2213<td width="8%"></td>
2214<td width="21%">
2215
2216<p><big>StoNits</big></p>
2217</td>
2218<td width="8%"></td>
2219<td width="6%">
2220
2221<p><big>37439</big></p>
2222</td>
2223<td width="53%">
2224
2225<p><big>R/W</big></p>
2226</td>
2227<tr valign="top" align="left">
2228<td width="8%"></td>
2229<td width="21%">
2230
2231<p><big>StripByteCounts</big></p>
2232</td>
2233<td width="8%"></td>
2234<td width="6%">
2235
2236<p><big>279</big></p>
2237</td>
2238<td width="53%">
2239
2240<p><big>R/W</big></p>
2241</td>
2242<tr valign="top" align="left">
2243<td width="8%"></td>
2244<td width="21%"></td>
2245<td width="8%"></td>
2246<td width="6%"></td>
2247<td width="53%">
2248
2249<p><big>data i/o</big></p>
2250</td>
2251<tr valign="top" align="left">
2252<td width="8%"></td>
2253<td width="21%">
2254
2255<p><big>StripOffsets</big></p>
2256</td>
2257<td width="8%"></td>
2258<td width="6%">
2259
2260<p><big>273</big></p>
2261</td>
2262<td width="53%">
2263
2264<p><big>R/W</big></p>
2265</td>
2266<tr valign="top" align="left">
2267<td width="8%"></td>
2268<td width="21%"></td>
2269<td width="8%"></td>
2270<td width="6%"></td>
2271<td width="53%">
2272
2273<p><big>data i/o</big></p>
2274</td>
2275<tr valign="top" align="left">
2276<td width="8%"></td>
2277<td width="21%">
2278
2279<p><big>SubFileType</big></p>
2280</td>
2281<td width="8%"></td>
2282<td width="6%">
2283
2284<p><big>255</big></p>
2285</td>
2286<td width="53%">
2287
2288<p><big>R/W</big></p>
2289</td>
2290<tr valign="top" align="left">
2291<td width="8%"></td>
2292<td width="21%"></td>
2293<td width="8%"></td>
2294<td width="6%"></td>
2295<td width="53%">
2296
2297<p><big>called OSubFileType in spec</big></p>
2298</td>
2299<tr valign="top" align="left">
2300<td width="8%"></td>
2301<td width="21%">
2302
2303<p><big>TargetPrinter</big></p>
2304</td>
2305<td width="8%"></td>
2306<td width="6%">
2307
2308<p><big>337</big></p>
2309</td>
2310<td width="53%">
2311
2312<p><big>R/W</big></p>
2313</td>
2314<tr valign="top" align="left">
2315<td width="8%"></td>
2316<td width="21%">
2317
2318<p><big>Thresholding</big></p>
2319</td>
2320<td width="8%"></td>
2321<td width="6%">
2322
2323<p><big>263</big></p>
2324</td>
2325<td width="53%">
2326
2327<p><big>R/W</big></p>
2328</td>
2329<tr valign="top" align="left">
2330<td width="8%"></td>
2331<td width="21%"></td>
2332<td width="8%"></td>
2333<td width="6%"></td>
2334<td width="53%">
2335</td>
2336<tr valign="top" align="left">
2337<td width="8%"></td>
2338<td width="21%">
2339
2340<p><big>TileByteCounts</big></p>
2341</td>
2342<td width="8%"></td>
2343<td width="6%">
2344
2345<p><big>324</big></p>
2346</td>
2347<td width="53%">
2348
2349<p><big>R/W</big></p>
2350</td>
2351<tr valign="top" align="left">
2352<td width="8%"></td>
2353<td width="21%"></td>
2354<td width="8%"></td>
2355<td width="6%"></td>
2356<td width="53%">
2357
2358<p><big>data i/o</big></p>
2359</td>
2360<tr valign="top" align="left">
2361<td width="8%"></td>
2362<td width="21%">
2363
2364<p><big>TileDepth</big></p>
2365</td>
2366<td width="8%"></td>
2367<td width="6%">
2368
2369<p><big>32998</big></p>
2370</td>
2371<td width="53%">
2372
2373<p><big>R/W</big></p>
2374</td>
2375<tr valign="top" align="left">
2376<td width="8%"></td>
2377<td width="21%"></td>
2378<td width="8%"></td>
2379<td width="6%"></td>
2380<td width="53%">
2381
2382<p><big>tile/strip calculations</big></p>
2383</td>
2384<tr valign="top" align="left">
2385<td width="8%"></td>
2386<td width="21%">
2387
2388<p><big>TileLength</big></p>
2389</td>
2390<td width="8%"></td>
2391<td width="6%">
2392
2393<p><big>323</big></p>
2394</td>
2395<td width="53%">
2396
2397<p><big>R/W</big></p>
2398</td>
2399<tr valign="top" align="left">
2400<td width="8%"></td>
2401<td width="21%"></td>
2402<td width="8%"></td>
2403<td width="6%"></td>
2404<td width="53%">
2405
2406<p><big>data i/o</big></p>
2407</td>
2408<tr valign="top" align="left">
2409<td width="8%"></td>
2410<td width="21%">
2411
2412<p><big>TileOffsets</big></p>
2413</td>
2414<td width="8%"></td>
2415<td width="6%">
2416
2417<p><big>324</big></p>
2418</td>
2419<td width="53%">
2420
2421<p><big>R/W</big></p>
2422</td>
2423<tr valign="top" align="left">
2424<td width="8%"></td>
2425<td width="21%"></td>
2426<td width="8%"></td>
2427<td width="6%"></td>
2428<td width="53%">
2429
2430<p><big>data i/o</big></p>
2431</td>
2432<tr valign="top" align="left">
2433<td width="8%"></td>
2434<td width="21%">
2435
2436<p><big>TileWidth</big></p>
2437</td>
2438<td width="8%"></td>
2439<td width="6%">
2440
2441<p><big>322</big></p>
2442</td>
2443<td width="53%">
2444
2445<p><big>R/W</big></p>
2446</td>
2447<tr valign="top" align="left">
2448<td width="8%"></td>
2449<td width="21%"></td>
2450<td width="8%"></td>
2451<td width="6%"></td>
2452<td width="53%">
2453
2454<p><big>data i/o</big></p>
2455</td>
2456<tr valign="top" align="left">
2457<td width="8%"></td>
2458<td width="21%">
2459
2460<p><big>TransferFunction</big></p>
2461</td>
2462<td width="8%"></td>
2463<td width="6%">
2464
2465<p><big>301</big></p>
2466</td>
2467<td width="53%">
2468
2469<p><big>R/W</big></p>
2470</td>
2471<tr valign="top" align="left">
2472<td width="8%"></td>
2473<td width="21%">
2474
2475<p><big>WhitePoint</big></p>
2476</td>
2477<td width="8%"></td>
2478<td width="6%">
2479
2480<p><big>318</big></p>
2481</td>
2482<td width="53%">
2483
2484<p><big>R/W</big></p>
2485</td>
2486<tr valign="top" align="left">
2487<td width="8%"></td>
2488<td width="21%">
2489
2490<p><big>XPosition</big></p>
2491</td>
2492<td width="8%"></td>
2493<td width="6%">
2494
2495<p><big>286</big></p>
2496</td>
2497<td width="53%">
2498
2499<p><big>R/W</big></p>
2500</td>
2501<tr valign="top" align="left">
2502<td width="8%"></td>
2503<td width="21%">
2504
2505<p><big>XResolution</big></p>
2506</td>
2507<td width="8%"></td>
2508<td width="6%">
2509
2510<p><big>282</big></p>
2511</td>
2512<td width="53%">
2513
2514<p><big>R/W</big></p>
2515</td>
2516<tr valign="top" align="left">
2517<td width="8%"></td>
2518<td width="21%">
2519
2520<p><big>YCbCrCoefficients</big></p>
2521</td>
2522<td width="8%"></td>
2523<td width="6%">
2524
2525<p><big>529</big></p>
2526</td>
2527<td width="53%">
2528
2529<p><big>R/W</big></p>
2530</td>
2531<tr valign="top" align="left">
2532<td width="8%"></td>
2533<td width="21%"></td>
2534<td width="8%"></td>
2535<td width="6%"></td>
2536<td width="53%">
2537
2538<p><big>used by TIFFRGBAImage support</big></p>
2539</td>
2540<tr valign="top" align="left">
2541<td width="8%"></td>
2542<td width="21%">
2543
2544<p><big>YCbCrPositioning</big></p>
2545</td>
2546<td width="8%"></td>
2547<td width="6%">
2548
2549<p><big>531</big></p>
2550</td>
2551<td width="53%">
2552
2553<p><big>R/W</big></p>
2554</td>
2555<tr valign="top" align="left">
2556<td width="8%"></td>
2557<td width="21%"></td>
2558<td width="8%"></td>
2559<td width="6%"></td>
2560<td width="53%">
2561
2562<p><big>tile/strip size calulcations</big></p>
2563</td>
2564<tr valign="top" align="left">
2565<td width="8%"></td>
2566<td width="21%">
2567
2568<p><big>YCbCrSubsampling</big></p>
2569</td>
2570<td width="8%"></td>
2571<td width="6%">
2572
2573<p><big>530</big></p>
2574</td>
2575<td width="53%">
2576
2577<p><big>R/W</big></p>
2578</td>
2579<tr valign="top" align="left">
2580<td width="8%"></td>
2581<td width="21%">
2582
2583<p><big>YPosition</big></p>
2584</td>
2585<td width="8%"></td>
2586<td width="6%">
2587
2588<p><big>286</big></p>
2589</td>
2590<td width="53%">
2591
2592<p><big>R/W</big></p>
2593</td>
2594<tr valign="top" align="left">
2595<td width="8%"></td>
2596<td width="21%">
2597
2598<p><big>YResolution</big></p>
2599</td>
2600<td width="8%"></td>
2601<td width="6%">
2602
2603<p><big>283</big></p>
2604</td>
2605<td width="53%">
2606
2607<p><big>R/W</big></p>
2608</td>
2609<tr valign="top" align="left">
2610<td width="8%"></td>
2611<td width="21%"></td>
2612<td width="8%"></td>
2613<td width="6%"></td>
2614<td width="53%">
2615
2616<p><big>used by Group 3 codec</big></p>
2617</td>
2618</table>
2619<a name="PSEUDO TAGS"></a>
2620<h2>PSEUDO TAGS</h2>
2621<!-- INDENTATION -->
2622<table width="100%" border=0 rules="none" frame="void"
2623 cols="2" cellspacing="0" cellpadding="0">
2624<tr valign="top" align="left">
2625<td width="8%"></td>
2626<td width="91%">
2627<p><big>In addition to the normal</big> TIFF <big>tags the
2628library supports a collection of tags whose values lie in a
2629range outside the valid range of</big> TIFF <big>tags. These
2630tags are termed <i>pseud-tags</i> and are used to control
2631various codec-specific functions within the library. The
2632table below summarizes the defined pseudo-tags.</big></p>
2633<!-- INDENTATION -->
2634<pre><big><i>Tag Name Codec R/W Library Use/Notes
2635</i></big></pre>
2636</td>
2637</table>
2638<!-- TABS -->
2639
2640<table width="100%" border=0 rules="none" frame="void"
2641 cols="5" cellspacing="0" cellpadding="0">
2642<tr valign="top" align="left">
2643<td width="8%"></td>
2644<td width="21%">
2645
2646<p><big>TIFFTAG_FAXMODE</big></p>
2647</td>
2648<td width="8%"></td>
2649<td width="6%">
2650
2651<p><big>G3</big></p>
2652</td>
2653<td width="53%">
2654
2655<p><big>R/W</big></p>
2656</td>
2657<tr valign="top" align="left">
2658<td width="8%"></td>
2659<td width="21%"></td>
2660<td width="8%"></td>
2661<td width="6%"></td>
2662<td width="53%">
2663
2664<p><big>general codec operation</big></p>
2665</td>
2666<tr valign="top" align="left">
2667<td width="8%"></td>
2668<td width="21%">
2669
2670<p><big>TIFFTAG_FAXFILLFUNC</big></p>
2671</td>
2672<td width="8%"></td>
2673<td width="6%">
2674
2675<p><big>G3/G4</big></p>
2676</td>
2677<td width="53%">
2678
2679<p><big>R/W</big></p>
2680</td>
2681<tr valign="top" align="left">
2682<td width="8%"></td>
2683<td width="21%"></td>
2684<td width="8%"></td>
2685<td width="6%"></td>
2686<td width="53%">
2687
2688<p><big>bitmap fill function</big></p>
2689</td>
2690<tr valign="top" align="left">
2691<td width="8%"></td>
2692<td width="21%">
2693
2694<p><big>TIFFTAG_JPEGQUALITY</big></p>
2695</td>
2696<td width="8%"></td>
2697<td width="6%">
2698
2699<p><big>JPEG</big></p>
2700</td>
2701<td width="53%">
2702
2703<p><big>R/W</big></p>
2704</td>
2705<tr valign="top" align="left">
2706<td width="8%"></td>
2707<td width="21%"></td>
2708<td width="8%"></td>
2709<td width="6%"></td>
2710<td width="53%">
2711
2712<p><big>compression quality control</big></p>
2713</td>
2714<tr valign="top" align="left">
2715<td width="8%"></td>
2716<td width="21%">
2717
2718<p><big>TIFFTAG_JPEGCOLORMODE</big></p>
2719</td>
2720<td width="8%"></td>
2721<td width="6%">
2722
2723<p><big>JPEG</big></p>
2724</td>
2725<td width="53%">
2726
2727<p><big>R/W</big></p>
2728</td>
2729<tr valign="top" align="left">
2730<td width="8%"></td>
2731<td width="21%"></td>
2732<td width="8%"></td>
2733<td width="6%"></td>
2734<td width="53%">
2735
2736<p><big>control colorspace conversions</big></p>
2737</td>
2738<tr valign="top" align="left">
2739<td width="8%"></td>
2740<td width="21%">
2741
2742<p><big>TIFFTAG_JPEGTABLESMODE</big></p>
2743</td>
2744<td width="8%"></td>
2745<td width="6%">
2746
2747<p><big>JPEG</big></p>
2748</td>
2749<td width="53%">
2750
2751<p><big>R/W</big></p>
2752</td>
2753<tr valign="top" align="left">
2754<td width="8%"></td>
2755<td width="21%"></td>
2756<td width="8%"></td>
2757<td width="6%"></td>
2758<td width="53%">
2759
2760<p><big>control contents of <i>JPEGTables</i> tag</big></p>
2761</td>
2762<tr valign="top" align="left">
2763<td width="8%"></td>
2764<td width="21%">
2765
2766<p><big>TIFFTAG_ZIPQUALITY</big></p>
2767</td>
2768<td width="8%"></td>
2769<td width="6%">
2770
2771<p><big>Deflate</big></p>
2772</td>
2773<td width="53%">
2774
2775<p><big>R/Wcompression quality level</big></p>
2776</td>
2777<tr valign="top" align="left">
2778<td width="8%"></td>
2779<td width="21%">
2780
2781<p><big>TIFFTAG_PIXARLOGDATAFMT</big></p>
2782</td>
2783<td width="8%"></td>
2784<td width="6%">
2785
2786<p><big>PixarLog</big></p>
2787</td>
2788<td width="53%">
2789
2790<p><big>R/Wuser data format</big></p>
2791</td>
2792<tr valign="top" align="left">
2793<td width="8%"></td>
2794<td width="21%">
2795
2796<p><big>TIFFTAG_PIXARLOGQUALITY</big></p>
2797</td>
2798<td width="8%"></td>
2799<td width="6%">
2800
2801<p><big>PixarLog</big></p>
2802</td>
2803<td width="53%">
2804
2805<p><big>R/Wcompression quality level</big></p>
2806</td>
2807<tr valign="top" align="left">
2808<td width="8%"></td>
2809<td width="21%">
2810
2811<p><big>TIFFTAG_SGILOGDATAFMT</big></p>
2812</td>
2813<td width="8%"></td>
2814<td width="6%">
2815
2816<p><big>SGILog</big></p>
2817</td>
2818<td width="53%">
2819
2820<p><big>R/W</big></p>
2821</td>
2822<tr valign="top" align="left">
2823<td width="8%"></td>
2824<td width="21%"></td>
2825<td width="8%"></td>
2826<td width="6%"></td>
2827<td width="53%">
2828
2829<p><big>user data format</big></p>
2830</td>
2831</table>
2832<!-- INDENTATION -->
2833<table width="100%" border=0 rules="none" frame="void"
2834 cols="2" cellspacing="0" cellpadding="0">
2835<tr valign="top" align="left">
2836<td width="8%"></td>
2837<td width="91%">
2838<p><big><b>TIFFTAG_FAXMODE</b></big></p></td>
2839</table>
2840<!-- INDENTATION -->
2841<table width="100%" border=0 rules="none" frame="void"
2842 cols="2" cellspacing="0" cellpadding="0">
2843<tr valign="top" align="left">
2844<td width="19%"></td>
2845<td width="80%">
2846<p><big>Control the operation of the Group 3 codec. Possible
2847values (independent bits that can be combined by
2848or&rsquo;ing them together) are: FAXMODE_CLASSIC (enable
2849old-style format in which the</big> RTC <big>is written at
2850the end of the last strip), FAXMODE_NORTC (opposite of
2851FAXMODE_CLASSIC; also called FAXMODE_CLASSF), FAXMODE_NOEOL
2852(do not write</big> EOL <big>codes at the start of each row
2853of data), FAXMODE_BYTEALIGN (align each encoded row to an
28548-bit boundary), FAXMODE_WORDALIGN (align each encoded row
2855to an 16-bit boundary), The default value is dependent on
2856the compression scheme; this pseudo-tag is used by the
2857various G3 and G4 codecs to share code.</big></p>
2858</td>
2859</table>
2860<!-- INDENTATION -->
2861<table width="100%" border=0 rules="none" frame="void"
2862 cols="2" cellspacing="0" cellpadding="0">
2863<tr valign="top" align="left">
2864<td width="8%"></td>
2865<td width="91%">
2866<p><big><b>TIFFTAG_FAXFILLFUNC</b></big></p></td>
2867</table>
2868<!-- INDENTATION -->
2869<table width="100%" border=0 rules="none" frame="void"
2870 cols="2" cellspacing="0" cellpadding="0">
2871<tr valign="top" align="left">
2872<td width="19%"></td>
2873<td width="80%">
2874<p><big>Control the function used to convert arrays of black
2875and white runs to packed bit arrays. This hook can be used
2876to image decoded scanlines in multi-bit depth rasters (e.g.
2877for display in colormap mode) or for other purposes. The
2878default value is a pointer to a builtin function that images
2879packed bilevel data.</big></p>
2880</td>
2881</table>
2882<!-- INDENTATION -->
2883<table width="100%" border=0 rules="none" frame="void"
2884 cols="2" cellspacing="0" cellpadding="0">
2885<tr valign="top" align="left">
2886<td width="8%"></td>
2887<td width="91%">
2888<p><big><b>TIFFTAG_IPTCNEWSPHOTO</b></big></p></td>
2889</table>
2890<!-- INDENTATION -->
2891<table width="100%" border=0 rules="none" frame="void"
2892 cols="2" cellspacing="0" cellpadding="0">
2893<tr valign="top" align="left">
2894<td width="19%"></td>
2895<td width="80%">
2896<p><big>Tag contaings image metadata per the IPTC newsphoto
2897spec: Headline, captioning, credit, etc... Used by most wire
2898services.</big></p>
2899</td>
2900</table>
2901<!-- INDENTATION -->
2902<table width="100%" border=0 rules="none" frame="void"
2903 cols="2" cellspacing="0" cellpadding="0">
2904<tr valign="top" align="left">
2905<td width="8%"></td>
2906<td width="91%">
2907<p><big><b>TIFFTAG_PHOTOSHOP</b></big></p></td>
2908</table>
2909<!-- INDENTATION -->
2910<table width="100%" border=0 rules="none" frame="void"
2911 cols="2" cellspacing="0" cellpadding="0">
2912<tr valign="top" align="left">
2913<td width="19%"></td>
2914<td width="80%">
2915<p><big>Tag contains Photoshop captioning information and
2916metadata. Photoshop uses in parallel and redundantly
2917alongside IPTCNEWSPHOTO information.</big></p>
2918</td>
2919</table>
2920<!-- INDENTATION -->
2921<table width="100%" border=0 rules="none" frame="void"
2922 cols="2" cellspacing="0" cellpadding="0">
2923<tr valign="top" align="left">
2924<td width="8%"></td>
2925<td width="91%">
2926<p><big><b>TIFFTAG_JPEGQUALITY</b></big></p></td>
2927</table>
2928<!-- INDENTATION -->
2929<table width="100%" border=0 rules="none" frame="void"
2930 cols="2" cellspacing="0" cellpadding="0">
2931<tr valign="top" align="left">
2932<td width="19%"></td>
2933<td width="80%">
2934<p><big>Control the compression quality level used in the
2935baseline algorithm. Note that quality levels are in the
2936range 0-100 with a default value of 75.</big></p>
2937</td>
2938</table>
2939<!-- INDENTATION -->
2940<table width="100%" border=0 rules="none" frame="void"
2941 cols="2" cellspacing="0" cellpadding="0">
2942<tr valign="top" align="left">
2943<td width="8%"></td>
2944<td width="91%">
2945<p><big><b>TIFFTAG_JPEGCOLORMODE</b></big></p></td>
2946</table>
2947<!-- INDENTATION -->
2948<table width="100%" border=0 rules="none" frame="void"
2949 cols="2" cellspacing="0" cellpadding="0">
2950<tr valign="top" align="left">
2951<td width="19%"></td>
2952<td width="80%">
2953<p><big>Control whether or not conversion is done between
2954RGB and YCbCr colorspaces. Possible values are:
2955JPEGCOLORMODE_RAW (do not convert), and JPEGCOLORMODE_RGB
2956(convert to/from RGB) The default value is
2957JPEGCOLORMODE_RAW.</big></p>
2958</td>
2959</table>
2960<!-- INDENTATION -->
2961<table width="100%" border=0 rules="none" frame="void"
2962 cols="2" cellspacing="0" cellpadding="0">
2963<tr valign="top" align="left">
2964<td width="8%"></td>
2965<td width="91%">
2966<p><big><b>TIFFTAG_JPEGTABLESMODE</b></big></p></td>
2967</table>
2968<!-- INDENTATION -->
2969<table width="100%" border=0 rules="none" frame="void"
2970 cols="2" cellspacing="0" cellpadding="0">
2971<tr valign="top" align="left">
2972<td width="19%"></td>
2973<td width="80%">
2974<p><big>Control the information written in the
2975<i>JPEGTables</i> tag. Possible values (independent bits
2976that can be combined by or&rsquo;ing them together) are:
2977JPEGTABLESMODE_QUANT (include quantization tables), and
2978JPEGTABLESMODE_HUFF (include Huffman encoding tables). The
2979default value is
2980JPEGTABLESMODE_QUANT|JPEGTABLESMODE_HUFF.</big></p>
2981</td>
2982</table>
2983<!-- INDENTATION -->
2984<table width="100%" border=0 rules="none" frame="void"
2985 cols="2" cellspacing="0" cellpadding="0">
2986<tr valign="top" align="left">
2987<td width="8%"></td>
2988<td width="91%">
2989<p><big><b>TIFFTAG_ZIPQUALITY</b></big></p></td>
2990</table>
2991<!-- INDENTATION -->
2992<table width="100%" border=0 rules="none" frame="void"
2993 cols="2" cellspacing="0" cellpadding="0">
2994<tr valign="top" align="left">
2995<td width="19%"></td>
2996<td width="80%">
2997<p><big>Control the compression technique used by the
2998Deflate codec. Quality levels are in the range 1-9 with
2999larger numbers yielding better compression at the cost of
3000more computation. The default quality level is 6 which
3001yields a good time-space tradeoff.</big></p>
3002</td>
3003</table>
3004<!-- INDENTATION -->
3005<table width="100%" border=0 rules="none" frame="void"
3006 cols="2" cellspacing="0" cellpadding="0">
3007<tr valign="top" align="left">
3008<td width="8%"></td>
3009<td width="91%">
3010<p><big><b>TIFFTAG_PIXARLOGDATAFMT</b></big></p></td>
3011</table>
3012<!-- INDENTATION -->
3013<table width="100%" border=0 rules="none" frame="void"
3014 cols="2" cellspacing="0" cellpadding="0">
3015<tr valign="top" align="left">
3016<td width="19%"></td>
3017<td width="80%">
3018<p><big>Control the format of user data passed <i>in</i> to
3019the PixarLog codec when encoding and passed <i>out</i> from
3020when decoding. Possible values are: PIXARLOGDATAFMT_8BIT for
30218-bit unsigned pixels, PIXARLOGDATAFMT_8BITABGR for 8-bit
3022unsigned ABGR-ordered pixels, PIXARLOGDATAFMT_11BITLOG for
302311-bit log-encoded raw data, PIXARLOGDATAFMT_12BITPICIO for
302412-bit PICIO-compatible data, PIXARLOGDATAFMT_16BIT for
302516-bit signed samples, and PIXARLOGDATAFMT_FLOAT for 32-bit
3026IEEE floating point samples.</big></p>
3027</td>
3028</table>
3029<!-- INDENTATION -->
3030<table width="100%" border=0 rules="none" frame="void"
3031 cols="2" cellspacing="0" cellpadding="0">
3032<tr valign="top" align="left">
3033<td width="8%"></td>
3034<td width="91%">
3035<p><big><b>TIFFTAG_PIXARLOGQUALITY</b></big></p></td>
3036</table>
3037<!-- INDENTATION -->
3038<table width="100%" border=0 rules="none" frame="void"
3039 cols="2" cellspacing="0" cellpadding="0">
3040<tr valign="top" align="left">
3041<td width="19%"></td>
3042<td width="80%">
3043<p><big>Control the compression technique used by the
3044PixarLog codec. This value is treated identically to
3045TIFFTAG_ZIPQUALITY; see the above description.</big></p>
3046</td>
3047</table>
3048<!-- INDENTATION -->
3049<table width="100%" border=0 rules="none" frame="void"
3050 cols="2" cellspacing="0" cellpadding="0">
3051<tr valign="top" align="left">
3052<td width="8%"></td>
3053<td width="91%">
3054<p><big><b>TIFFTAG_SGILOGDATAFMT</b></big></p></td>
3055</table>
3056<!-- INDENTATION -->
3057<table width="100%" border=0 rules="none" frame="void"
3058 cols="2" cellspacing="0" cellpadding="0">
3059<tr valign="top" align="left">
3060<td width="19%"></td>
3061<td width="80%">
3062<p><big>Control the format of client data passed <i>in</i>
3063to the SGILog codec when encoding and passed <i>out</i> from
3064when decoding. Possible values are: SGILOGDATAFMT_FLTXYZ for
3065converting between LogLuv and 32-bit IEEE floating valued
3066XYZ pixels, SGILOGDATAFMT_16BITLUV for 16-bit encoded Luv
3067pixels, SGILOGDATAFMT_32BITRAW and SGILOGDATAFMT_24BITRAW
3068for no conversion of data, SGILOGDATAFMT_8BITRGB for
3069returning 8-bit RGB data (valid only when decoding
3070LogLuv-encoded data), SGILOGDATAFMT_FLTY for converting
3071between LogL and 32-bit IEEE floating valued Y pixels,
3072SGILOGDATAFMT_16BITL for 16-bit encoded L pixels, and
3073SGILOGDATAFMT_8BITGRY for returning 8-bit greyscale data
3074(valid only when decoding LogL-encoded data).</big></p>
3075</td>
3076</table>
3077<a name="DIAGNOSTICS"></a>
3078<h2>DIAGNOSTICS</h2>
3079<!-- INDENTATION -->
3080<table width="100%" border=0 rules="none" frame="void"
3081 cols="2" cellspacing="0" cellpadding="0">
3082<tr valign="top" align="left">
3083<td width="8%"></td>
3084<td width="91%">
3085<p><big>All error messages are directed through the
3086<i>TIFFError</i> routine. By default messages are directed
3087to <b>stderr</b> in the form: <i>module: message\n.</i>
3088Warning messages are likewise directed through the
3089<i>TIFFWarning</i> routine.</big></p>
3090</td>
3091</table>
3092<a name="SEE ALSO"></a>
3093<h2>SEE ALSO</h2>
3094<!-- INDENTATION -->
3095<table width="100%" border=0 rules="none" frame="void"
3096 cols="2" cellspacing="0" cellpadding="0">
3097<tr valign="top" align="left">
3098<td width="8%"></td>
3099<td width="91%">
3100<p><big><b>fax2tiff</b>(1), <b>gif2tiff</b>(1),
3101<b>pal2rgb</b>(1), <b>ppm2tiff</b>(1), <b>rgb2ycbcr</b>(1),
3102<b>ras2tiff</b>(1), <b>raw2tiff</b>(1), <b>sgi2tiff</b>(1),
3103<b>tiff2bw</b>(1), <b>tiffdither</b>(1), <b>tiffdump</b>(1),
3104<b>tiffcp</b>(1), <b>tiffcmp</b>(1), <b>tiffgt</b>(1),
3105<b>tiffinfo</b>(1), <b>tiffmedian</b>(1),
3106<b>tiffsplit</b>(1), <b>tiffsv</b>(1).</big></p>
3107<!-- INDENTATION -->
3108<p><big><b>Tag Image File Format Specification &mdash;
3109Revision 6.0</b>, an Aldus Technical Memorandum.</big></p>
3110<!-- INDENTATION -->
3111<p><big><b>The Spirit of TIFF Class F</b>, an appendix to
3112the TIFF 5.0 specification prepared by Cygnet
3113Technologies.</big></p>
3114<!-- INDENTATION -->
3115<p><big>Libtiff library home page:
3116<b>http://www.remotesensing.org/libtiff/</b></big></p>
3117</td>
3118</table>
3119<a name="BUGS"></a>
3120<h2>BUGS</h2>
3121<!-- INDENTATION -->
3122<table width="100%" border=0 rules="none" frame="void"
3123 cols="2" cellspacing="0" cellpadding="0">
3124<tr valign="top" align="left">
3125<td width="8%"></td>
3126<td width="91%">
3127<p><big>The library does not support multi-sample images
3128where some samples have different bits/sample.</big></p>
3129<!-- INDENTATION -->
3130<p><big>The library does not support random access to
3131compressed data that is organized with more than one row per
3132tile or strip.</big></p>
3133</td>
3134</table>
3135<hr>
3136</body>
3137</html>
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