<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML><HEAD><TITLE>Manpage of TIFFGetField</TITLE> </HEAD><BODY BGCOLOR=WHITE><FONT FACE="helvetica, sans, arial"> <H1>TIFFGetField</H1> Section: Misc. Reference Manual Pages (3T)<BR>Updated: August 22, 1997<BR><A HREF="#index">Index</A> <BR><A HREF="index.html">Return to Main Contents</A> <HR> <A NAME="lbAB"> </A> <H2>NAME</H2> TIFFGetField, TIFFVGetField - get the value(s) of a tag in an open <FONT SIZE="-1">TIFF</FONT> file <A NAME="lbAC"> </A> <H2>SYNOPSIS</H2> <B>#include <<A HREF="file:/usr/include/tiffio.h">tiffio.h</A>></B> <BR> <B>int TIFFGetField(TIFF* tif, ttag_t tag, ...)</B> <P> <B>#include <<A HREF="file:/usr/include/stdarg.h">stdarg.h</A>></B> <BR> <B>int TIFFVGetField(TIFF* tif, ttag_t tag, va_list ap)</B> <P> <B>int TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)</B> <BR> <B>int TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap)</B> <A NAME="lbAD"> </A> <H2>DESCRIPTION</H2> <I>TIFFGetField</I> returns the value of a tag or pseudo-tag associated with the the current directory of the open <FONT SIZE="-1">TIFF</FONT> file <I>tif</I>. (A <I>pseudo-tag </I> is a parameter that is used to control the operation of the <FONT SIZE="-1">TIFF</FONT> library but whose value is not read or written to the underlying file.) The file must have been previously opened with <I><A HREF="TIFFOpen.3t.html">TIFFOpen</A></I>(3T). The tag is identified by <I>tag</I>, one of the values defined in the include file <B>tiff.h</B> (see also the table below). The type and number of values returned is dependent on the tag being requested. The programming interface uses a variable argument list as prescribed by the <I><A HREF="stdarg+3">stdarg</A></I>(3) interface. The returned values should only be interpreted if <I>TIFFGetField</I> returns 1. <P> <I>TIFFVGetField</I> is functionally equivalent to <I>TIFFGetField</I> except that it takes a pointer to a variable argument list. <I>TIFFVGetField</I> is useful for layering interfaces on top of the functionality provided by <I>TIFFGetField</I>. <P> <I>TIFFGetFieldDefaulted</I> and <I>TIFFVGetFieldDefaulted</I> are identical to <I>TIFFGetField</I> and <I>TIFFVGetField</I>, except that if a tag is not defined in the current directory and it has a default value, then the default value is returned. <P> The tags understood by <I>libtiff</I>, the number of parameter values, and the types for the returned values are shown below. The data types are specified as in C and correspond to the types used to specify tag values to <I><A HREF="TIFFSetField.3t.html">TIFFSetField</A></I>(3T). Remember that <I>TIFFGetField</I> returns parameter values, so all the listed data types are pointers to storage where values should be returned. Consult the <FONT SIZE="-1">TIFF</FONT> specification for information on the meaning of each tag and their possible values. <P> <PRE> <I>Tag Name</I> <I>Count</I> <I>Types</I> <I>Notes</I> TIFFTAG_ARTIST 1 char** TIFFTAG_BADFAXLINES 1 uint32* TIFFTAG_BITSPERSAMPLE 1 uint16* TIFFTAG_CLEANFAXDATA 1 uint16* TIFFTAG_COLORMAP 3 uint16** 1<<BitsPerSample arrays TIFFTAG_COMPRESSION 1 uint16* TIFFTAG_CONSECUTIVEBADFAXLINES 1 uint32* TIFFTAG_DATATYPE 1 uint16* TIFFTAG_DATETIME 1 char** TIFFTAG_DOCUMENTNAME 1 char** TIFFTAG_DOTRANGE 2 uint16* TIFFTAG_EXTRASAMPLES 2 uint16*,uint16** count & types array TIFFTAG_FAXMODE 1 int* G3/G4 compression pseudo-tag TIFFTAG_FAXFILLFUNC 1 TIFFFaxFillFunc* G3/G4 compression pseudo-tag TIFFTAG_FILLORDER 1 uint16* TIFFTAG_GROUP3OPTIONS 1 uint32* TIFFTAG_GROUP4OPTIONS 1 uint32* TIFFTAG_HALFTONEHINTS 2 uint16* TIFFTAG_HOSTCOMPUTER 1 char** TIFFTAG_IMAGEDEPTH 1 uint32* TIFFTAG_IMAGEDESCRIPTION 1 char** TIFFTAG_IMAGELENGTH 1 uint32* TIFFTAG_IMAGEWIDTH 1 uint32* TIFFTAG_INKNAMES 1 char** TIFFTAG_INKSET 1 uint16* TIFFTAG_JPEGTABLES 2 u_short*,void** count & tables TIFFTAG_JPEGQUALITY 1 int* JPEG pseudo-tag TIFFTAG_JPEGCOLORMODE 1 int* JPEG pseudo-tag TIFFTAG_JPEGTABLESMODE 1 int* JPEG pseudo-tag TIFFTAG_MAKE 1 char** TIFFTAG_MATTEING 1 uint16* TIFFTAG_MAXSAMPLEVALUE 1 uint16* TIFFTAG_MINSAMPLEVALUE 1 uint16* TIFFTAG_MODEL 1 char** TIFFTAG_ORIENTATION 1 uint16* TIFFTAG_PAGENAME 1 char** TIFFTAG_PAGENUMBER 2 uint16* TIFFTAG_PHOTOMETRIC 1 uint16* TIFFTAG_PLANARCONFIG 1 uint16* TIFFTAG_PREDICTOR 1 uint16* TIFFTAG_PRIMARYCHROMATICITIES 1 float** 6-entry array TIFFTAG_REFERENCEBLACKWHITE 1 float** 2*SamplesPerPixel array TIFFTAG_RESOLUTIONUNIT 1 uint16* TIFFTAG_ROWSPERSTRIP 1 uint32* TIFFTAG_SAMPLEFORMAT 1 uint16* TIFFTAG_SAMPLESPERPIXEL 1 uint16* TIFFTAG_SMAXSAMPLEVALUE 1 double* TIFFTAG_SMINSAMPLEVALUE 1 double* TIFFTAG_SOFTWARE 1 char** TIFFTAG_STONITS 1 double** TIFFTAG_STRIPBYTECOUNTS 1 uint32** TIFFTAG_STRIPOFFSETS 1 uint32** TIFFTAG_SUBFILETYPE 1 uint32* TIFFTAG_SUBIFD 2 uint16*,uint32** count & offsets array TIFFTAG_TARGETPRINTER 1 char** TIFFTAG_THRESHHOLDING 1 uint16* TIFFTAG_TILEBYTECOUNTS 1 uint32** TIFFTAG_TILEDEPTH 1 uint32* TIFFTAG_TILELENGTH 1 uint32* TIFFTAG_TILEOFFSETS 1 uint32** TIFFTAG_TILEWIDTH 1 uint32* TIFFTAG_TRANSFERFUNCTION 1 or 3+ uint16**1<<BitsPerSample entry arrays TIFFTAG_WHITEPOINT 1 float** 2-entry array TIFFTAG_XPOSITION 1 float* TIFFTAG_XRESOLUTION 1 float* TIFFTAG_YCBCRCOEFFICIENTS 1 float** 3-entry array TIFFTAG_YCBCRPOSITIONING 1 uint16* TIFFTAG_YCBCRSUBSAMPLING 2 uint16* TIFFTAG_YPOSITION 1 float* TIFFTAG_YRESOLUTION 1 float* TIFFTAG_ICCPROFILE 2 uint32*,void** count, profile datadd </PRE> + If <I>SamplesPerPixel</I> is one, then a single array is returned; otherwise three arrays are returned. dd The contents of this field are quite complex. See <I>The ICC Profile Format Specification</I>, Annex B.3 "Embedding ICC Profiles in TIFF Files" (available at <A HREF="http://www.color.org)">http://www.color.org)</A> for an explanation. <A NAME="lbAE"> </A> <H2>RETURN VALUES</H2> 1 is returned if the tag is defined in the current directory; otherwise a 0 is returned. <A NAME="lbAF"> </A> <H2>DIAGNOSTICS</H2> All error messages are directed to the <I><A HREF="TIFFError.3t.html">TIFFError</A></I>(3T) routine. <P> <B>Unknown field, tag 0x%x</B>. An unknown tag was supplied. <A NAME="lbAG"> </A> <H2>SEE ALSO</H2> <I><A HREF="libtiff.3t.html">libtiff</A></I>(3T), <I><A HREF="TIFFOpen.3t.html">TIFFOpen</A></I>(3T), <I><A HREF="TIFFSetField.3t.html">TIFFSetField</A></I>(3T), <I><A HREF="TIFFSetDirectory.3t.html">TIFFSetDirectory</A></I>(3T), <I><A HREF="TIFFReadDirectory.3t.html">TIFFReadDirectory</A></I>(3T), <I><A HREF="TIFFWriteDirectory.3t.html">TIFFWriteDirectory</A></I>(3T) <HR> <A NAME="index"> </A><H2>Index</H2> <DL> <DT><A HREF="#lbAB">NAME</A><DD> <DT><A HREF="#lbAC">SYNOPSIS</A><DD> <DT><A HREF="#lbAD">DESCRIPTION</A><DD> <DT><A HREF="#lbAE">RETURN VALUES</A><DD> <DT><A HREF="#lbAF">DIAGNOSTICS</A><DD> <DT><A HREF="#lbAG">SEE ALSO</A><DD> </DL> <HR> This document was created by <A HREF="index.html">man2html</A>, using the manual pages.<BR> Time: 01:31:37 GMT, November 23, 1999 </BODY> </HTML>
distrib
>
Mandriva
>
9.1
>
ppc
>
media
>
main
>
by-pkgid
>
0778f7fb77394070b8f63a2a040f2017
>
files
>
43
