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7<title>INTRO</title>
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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"
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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"
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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 particul