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.TH "TIFFSETTAGEXTENDER" "3tiff" "Jan 27, 2024" "4.5" "LibTIFF"
.SH NAME
TIFFSetTagExtender \- register the merge function for user defined tags as an extender callback with libtiff
.SH SYNOPSIS
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.INDENT 3.5
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.EX
#include <tiffio.h>
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.TP
.B TIFFExtendProc TIFFSetTagExtender(TIFFExtendProc extender) 
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.SH DESCRIPTION
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\fI\%TIFFSetTagExtender()\fP is used to register the merge function
for user defined tags as an extender callback with \fBlibtiff\fP\&.
A brief description can be found at \fI\%Defining Application Tags\fP\&.
.sp
\fBNOTE:\fP
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\fI\%TIFFSetTagExtender()\fP cannot be used to extend custom directories
(for example EXIF, GPS or other custom directories).
Only the TIFF directory can be extended with additional tags.
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.SH SEE ALSO
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\fI\%libtiff\fP (3tiff),
\fI\%Defining New TIFF Tags\fP (3tiff),
\fI\%TIFFMergeFieldInfo\fP (3tiff)
.SH AUTHOR
LibTIFF contributors
.SH COPYRIGHT
1988-2024, LibTIFF contributors
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