TIFFFIELDWRITECOUNT(3tiff) LibTIFF TIFFFIELDWRITECOUNT(3tiff)
NAME
TIFFFieldWriteCount - get number of values to be written to field
SYNOPSIS
#include <tiffio.h>
int TIFFFieldWriteCount(const TIFFField *fip)
DESCRIPTION
TIFFFieldWriteCount() returns the number of values to be written into
the specified TIFF field; that is, the number of arguments that should
be supplied to TIFFSetField(). For most field types this is a small
positive integer, typically 1 or 2, but there are some special values:
• TIFF_VARIABLE indicates that a variable number of values is possible;
then, a uint16_t count argument and a pointer data argument must be
supplied to TIFFSetField().
• TIFF_VARIABLE2 is the same as TIFF_VARIABLE except that the count ar-
gument must have type uint32_t. (On most modern machines, this makes
no practical difference, and the count argument can simply be an int
in either case.)
• TIFF_SPP indicates that the number of arguments must be equal to the
image's number of samples per pixel.
fip is a field information pointer previously returned by
TIFFFindField(), TIFFFieldWithTag(), or TIFFFieldWithName().
For most field types, TIFFFieldWriteCount() returns the same value as
TIFFFieldReadCount(), but there are some exceptions.
RETURN VALUES
TIFFFieldWriteCount() returns an integer.
SEE ALSO
libtiff (3tiff)
AUTHOR
LibTIFF contributors
COPYRIGHT
1988-2023, LibTIFF contributors
4.5 Nov 23, 2023 TIFFFIELDWRITECOUNT(3tiff)
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