src/tiff/man/TIFFFieldReadCount.3tiff

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  23 .if n .po 0
  24 .TH TIFFFieldReadCount 3TIFF "July 26, 2012" "libtiff"
  25 .SH NAME
  26 TIFFFieldReadCount \- Get number of values to be read from field
  27 .SH SYNOPSIS
  28 .B "#include <tiffio.h>"
  29 .sp
  30 .BI "int TIFFFieldReadCount(const TIFFField* " fip ")"
  31 .SH DESCRIPTION
  32 .BR TIFFFieldReadCount
  33 returns the number of values available to be read from the specified
  34 TIFF field; that is, the number of arguments that should be supplied to
  35 .BR TIFFGetField .
  36 For most field types this is a small positive integer, typically 1 or 2,
  37 but there are some special values:
  38 .br
  39 .BR TIFF_VARIABLE
  40 indicates that a variable number of values is possible; then, a
  41 .BR uint16
  42 .I count
  43 argument and a pointer
  44 .I data
  45 argument must be supplied to
  46 .BR TIFFGetField .
  47 .br
  48 .BR TIFF_VARIABLE2
  49 is the same as
  50 .BR TIFF_VARIABLE
  51 except that the
  52 .I count
  53 argument must have type
  54 .BR uint32 .
  55 .br
  56 .BR TIFF_SPP
  57 indicates that the number of arguments is equal to the image's
  58 number of samples per pixel.
  59 .P
  60 .I fip
  61 is a field information pointer previously returned by
  62 .BR TIFFFindField ,
  63 .BR TIFFFieldWithTag ,
  64 or
  65 .BR TIFFFieldWithName .
  66 .br
  67 .SH "RETURN VALUES"
  68 .br
  69 .BR TIFFFieldReadCount
  70 returns an integer.
  71 .br
  72 .SH "SEE ALSO"
  73 .BR libtiff (3TIFF),
  74 .PP
  75 Libtiff library home page:
  76 .BR http://www.remotesensing.org/libtiff/