src/tiff/man/TIFFReadRawTile.3tiff

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  24 .if n .po 0
  25 .TH TIFFReadRawTile 3TIFF "October 15, 1995" "libtiff"
  26 .SH NAME
  27 TIFFReadRawTile \- return an undecoded tile of data from an open
  28 .SM TIFF
  29 file
  30 .SH SYNOPSIS
  31 .B "#include <tiffio.h>"
  32 .sp
  33 .BI "tsize_t TIFFReadRawTile(TIFF *" tif ", ttile_t " tile ", tdata_t " buf ", tsize_t " size ")"
  34 .SH DESCRIPTION
  35 Read the contents of the specified tile into the (user supplied) data buffer.
  36 Note that the value of
  37 .I tile
  38 is a ``raw tile number.'' That is, the caller must take into account whether
  39 or not the data is organized in separate planes (\c
  40 .IR PlanarConfiguration =2).
  41 .I TIFFComputeTile
  42 automatically does this when converting an (x,y,z,sample) coordinate quadruple
  43 to a tile number. To read a full tile of data the data buffer should typically
  44 be at least as large as the value returned by
  45 .IR TIFFTileSize .
  46 .SH "RETURN VALUES"
  47 The actual number of bytes of data that were placed in
  48 .I buf
  49 is returned;
  50 .IR TIFFReadEncodedTile
  51 returns \-1 if an error was encountered.
  52 .SH DIAGNOSTICS
  53 All error messages are directed to the
  54 .BR TIFFError (3TIFF)
  55 routine.
  56 .SH "SEE ALSO"
  57 .BR TIFFOpen (3TIFF),
  58 .BR TIFFReadEncodedTile (3TIFF),
  59 .BR TIFFReadTile (3TIFF),
  60 .BR TIFFTileSize (3TIFF),
  61 .BR libtiff (3TIFF)
  62 .PP
  63 Libtiff library home page:
  64 .BR http://www.remotesensing.org/libtiff/