2002-04-04 09:40:14 -05:00
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.\" $Header: /cvs/maptools/cvsroot/libtiff/man/Attic/TIFFSetField.3t,v 1.4 2002-04-04 14:40:14 dron Exp $
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1999-07-27 17:50:26 -04:00
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.\"
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.\" Copyright (c) 1988-1997 Sam Leffler
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.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
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.\"
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.\" Permission to use, copy, modify, distribute, and sell this software and
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.\" its documentation for any purpose is hereby granted without fee, provided
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.\" that (i) the above copyright notices and this permission notice appear in
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.\" all copies of the software and related documentation, and (ii) the names of
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.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
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.\" publicity relating to the software without the specific, prior written
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.\" permission of Sam Leffler and Silicon Graphics.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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.\" OF THIS SOFTWARE.
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.\"
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.if n .po 0
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.TH TIFFSetField 3T "August 28, 1997"
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.SH NAME
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TIFFSetField \- set the value(s) of a tag in a
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.SM TIFF
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file open for writing
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.SH SYNOPSIS
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.B "#include <tiffio.h>"
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.br
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.B "int TIFFSetField(TIFF* tif, ttag_t tag, ...)"
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.br
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.B "#include <stdarg.h>"
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.br
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.B "int TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)"
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.SH DESCRIPTION
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.IR TIFFSetField
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sets the value of a field
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or pseudo-tag in the current directory associated with
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the open
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.SM TIFF
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file
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.IR tif .
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(A
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.I pseudo-tag
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is a parameter that is used to control the operation of the
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.SM TIFF
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library but whose value is not read or written to the underlying file.)
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To set the value of a field
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the file must have been previously opened for writing with
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.IR TIFFOpen (3T);
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pseudo-tags can be set whether the file was opened for reading
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or writing.
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The field is identified by
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.IR tag ,
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one of the values defined in the include file
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.B tiff.h
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(see also the table below).
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The actual value is specified using a variable argument list,
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as prescribed by the
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.IR stdarg (3)
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interface (\c
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or, on some machines, the
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.IR varargs (3)
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interface.)
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.PP
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.IR TIFFVSetField
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is functionally equivalent to
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.IR TIFFSetField
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except that it takes a pointer to a variable
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argument list.
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.I TIFFVSetField
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is useful for writing routines that are layered
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on top of the functionality provided by
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.IR TIFFSetField .
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.PP
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The tags understood by
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.IR libtiff ,
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the number of parameter values, and the
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expected types for the parameter values are shown below.
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The data types are:
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.I char*
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is null-terminated string and corresponds to the
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.SM ASCII
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data type;
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.I uint16
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is an unsigned 16-bit value;
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.I uint32
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is an unsigned 32-bit value;
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.I uint16*
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is an array of unsigned 16-bit values.
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.I void*
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is an array of data values of unspecified type.
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Consult the
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.SM TIFF
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specification for information on the meaning of each tag.
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.PP
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.nf
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.ta \w'TIFFTAG_CONSECUTIVEBADFAXLINES'u+2n +\w'Count'u+2n +\w'TIFFFaxFillFunc \(dg'u+2n
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\fITag Name\fP \fICount\fP \fITypes\fP \fINotes\fP
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.sp 5p
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TIFFTAG_ARTIST 1 char*
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TIFFTAG_BADFAXLINES 1 uint32
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TIFFTAG_BITSPERSAMPLE 1 uint16 \(dg
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TIFFTAG_CLEANFAXDATA 1 uint16
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TIFFTAG_COLORMAP 3 uint16* 1<<BitsPerSample arrays
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TIFFTAG_COMPRESSION 1 uint16 \(dg
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TIFFTAG_CONSECUTIVEBADFAXLINES 1 uint32
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2002-04-04 09:40:14 -05:00
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TIFFTAG_COPYRIGHT 1 char*
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1999-07-27 17:50:26 -04:00
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TIFFTAG_DATETIME 1 char*
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TIFFTAG_DOCUMENTNAME 1 char*
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TIFFTAG_DOTRANGE 2 uint16
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TIFFTAG_EXTRASAMPLES 2 uint16,uint16* \(dg count & types array
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TIFFTAG_FAXMODE 1 int \(dg G3/G4 compression pseudo-tag
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TIFFTAG_FAXFILLFUNC 1 TIFFFaxFillFunc G3/G4 compression pseudo-tag
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TIFFTAG_FILLORDER 1 uint16 \(dg
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TIFFTAG_GROUP3OPTIONS 1 uint32 \(dg
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TIFFTAG_GROUP4OPTIONS 1 uint32 \(dg
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TIFFTAG_HALFTONEHINTS 2 uint16
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TIFFTAG_HOSTCOMPUTER 1 char*
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TIFFTAG_IMAGEDESCRIPTION 1 char*
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TIFFTAG_IMAGEDEPTH 1 uint32 \(dg
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TIFFTAG_IMAGELENGTH 1 uint32
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TIFFTAG_IMAGEWIDTH 1 uint32 \(dg
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TIFFTAG_INKNAMES 1 char*
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TIFFTAG_INKSET 1 uint16 \(dg
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TIFFTAG_JPEGTABLES 2 uint32*,void* \(dg count & tables
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TIFFTAG_JPEGQUALITY 1 int JPEG pseudo-tag
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TIFFTAG_JPEGCOLORMODE 1 int \(dg JPEG pseudo-tag
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TIFFTAG_JPEGTABLESMODE 1 int \(dg JPEG pseudo-tag
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TIFFTAG_MAKE 1 char*
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TIFFTAG_MATTEING 1 uint16 \(dg
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TIFFTAG_MAXSAMPLEVALUE 1 uint16
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TIFFTAG_MINSAMPLEVALUE 1 uint16
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TIFFTAG_MODEL 1 char*
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TIFFTAG_ORIENTATION 1 uint16
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TIFFTAG_PAGENAME 1 char*
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TIFFTAG_PAGENUMBER 2 uint16
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TIFFTAG_PHOTOMETRIC 1 uint16
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TIFFTAG_PLANARCONFIG 1 uint16 \(dg
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TIFFTAG_PREDICTOR 1 uint16 \(dg
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TIFFTAG_PRIMARYCHROMATICITIES 1 float* 6-entry array
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TIFFTAG_REFERENCEBLACKWHITE 1 float* \(dg 2*SamplesPerPixel array
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TIFFTAG_RESOLUTIONUNIT 1 uint16
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TIFFTAG_ROWSPERSTRIP 1 uint32 \(dg must be > 0
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TIFFTAG_SAMPLEFORMAT 1 uint16 \(dg
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TIFFTAG_SAMPLESPERPIXEL 1 uint16 \(dg value must be <= 4
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TIFFTAG_SMAXSAMPLEVALUE 1 double
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TIFFTAG_SMINSAMPLEVALUE 1 double
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TIFFTAG_SOFTWARE 1 char*
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TIFFTAG_STONITS 1 double \(dg
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TIFFTAG_SUBFILETYPE 1 uint32
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TIFFTAG_SUBIFD 2 uint16,uint32* count & offsets array
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TIFFTAG_TARGETPRINTER 1 char*
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TIFFTAG_THRESHHOLDING 1 uint16
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TIFFTAG_TILEDEPTH 1 uint32 \(dg
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TIFFTAG_TILELENGTH 1 uint32 \(dg must be a multiple of 8
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TIFFTAG_TILEWIDTH 1 uint32 \(dg must be a multiple of 8
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TIFFTAG_TRANSFERFUNCTION 1 or 3 \(dd uint16* 1<<BitsPerSample entry arrays
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TIFFTAG_XPOSITION 1 float
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TIFFTAG_XRESOLUTION 1 float
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TIFFTAG_WHITEPOINT 1 float* 2-entry array
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TIFFTAG_YCBCRCOEFFICIENTS 1 float* \(dg 3-entry array
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TIFFTAG_YCBCRPOSITIONING 1 uint16 \(dg
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TIFFTAG_YCBCRSAMPLING 2 uint16 \(dg
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TIFFTAG_YPOSITION 1 float
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TIFFTAG_YRESOLUTION 1 float
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TIFFTAG_ICCPROFILE 2 uint32,void* count, profile data*
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.fi
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.sp 5p
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\(dg Tag may not have its values changed once data is written.
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.br
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.fi
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\(dd
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If
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.I SamplesPerPixel
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is one, then a single array is passed; otherwise three arrays should be
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passed.
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.fi
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* The contents of this field are quite complex. See
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.IR "The ICC Profile Format Specification" ,
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Annex B.3 "Embedding ICC Profiles in TIFF Files"
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(available at http://www.color.org) for an explanation.
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.br
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.SH "RETURN VALUES"
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1 is returned if the tag is defined in the current
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directory; otherwise a 0 is returned.
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.SH "RETURN VALUES"
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1 is returned if the operation was successful.
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Otherwise, 0 is returned if an error was detected.
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.SH DIAGNOSTICS
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All error messages are directed to the
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.IR TIFFError (3T)
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routine.
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.PP
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\fB%s: Cannot modify tag "%s" while writing\fP.
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Data has already been written to the file, so the
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specified tag's value can not be changed.
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This restriction is applied to all tags that affect
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the format of written data.
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.PP
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\fB%d: Bad value for "%s"\fP.
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An invalid value was supplied for the named tag.
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.SH "SEE ALSO"
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.IR libtiff (3T),
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.IR TIFFOpen (3T),
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.IR TIFFGetField (3T),
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.IR TIFFSetDirectory (3T),
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.IR TIFFWriteDirectory (3T),
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.IR TIFFReadDirectory (3T)
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