#include <tiffio.h>
int TIFFFieldReadCount(const TIFFField *fip)


TIFFFieldReadCount() returns the number of values available to be read from the specified TIFF field; that is, the number of arguments that should be supplied to TIFFGetField(). For most field types this is a small positive integer, typically 1 or 2, but there are some special values:

  • TIFF_VARIABLE = -1 indicates that a variable number of values is possible; then, a uint16_t count argument and a pointer data argument must be supplied to TIFFGetField().

  • TIFF_VARIABLE2 = -3 is the same as TIFF_VARIABLE except that the count argument must have type uint32_t.

  • TIFF_SPP = -2 indicates that the number of arguments is equal to the image's number of samples per pixel.

fip is a field information pointer previously returned by TIFFFindField(), TIFFFieldWithTag(), or TIFFFieldWithName().

Return values

TIFFFieldReadCount() returns an integer.

See also

TIFFFieldDataType (3tiff), TIFFFieldName (3tiff), TIFFFieldPassCount (3tiff), TIFFFieldQuery (3tiff), TIFFFieldTag (3tiff), TIFFFieldWriteCount (3tiff), libtiff (3tiff)