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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<meta name="Content-Style" content="text/css">
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<title>TIFFReadEncodedTile</title>
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TIFFReadEncodedTile
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NAME
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SYNOPSIS
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DESCRIPTION
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NOTES
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RETURN VALUES
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DIAGNOSTICS
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SEE ALSO
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NAME
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cols="2" cellspacing="0" cellpadding="0">
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TIFFReadEncodedTile − read and decode a tile of
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data from an open <small>TIFF</small> file
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SYNOPSIS
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cols="2" cellspacing="0" cellpadding="0">
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#include <tiffio.h>
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int TIFFReadEncodedTile(TIFF *tif,
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ttile_t tile, tdata_t buf,
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tsize_t size)
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DESCRIPTION
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cols="2" cellspacing="0" cellpadding="0">
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Read the specified tile of data and place up to
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size bytes of decompressed information in the (user
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supplied) data buffer.
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NOTES
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cols="2" cellspacing="0" cellpadding="0">
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The value of tile is a ‘‘raw tile
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number.’’ That is, the caller must take into
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account whether or not the data are organized in separate
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planes (PlanarConfiguration=2).
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TIFFComputeTile automatically does this when
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converting an (x,y,z,sample) coordinate quadruple to a tile
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number. To read a full tile of data the data buffer should
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be at least as large as the value returned by
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TIFFTileSize.
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The library attempts to hide bit- and byte-ordering
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differences between the image and the native machine by
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converting data to the native machine order. Bit reversal is
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done if the FillOrder tag is opposite to the native
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machine bit order. 16- and 32-bit samples are automatically
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byte-swapped if the file was written with a byte order
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opposite to the native machine byte order,
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RETURN VALUES
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cols="2" cellspacing="0" cellpadding="0">
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The actual number of bytes of data that were placed in
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buf is returned; TIFFReadEncodedTile returns
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−1 if an error was encountered.
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DIAGNOSTICS
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cols="2" cellspacing="0" cellpadding="0">
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All error messages are directed to the
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TIFFError(3TIFF) routine.
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SEE ALSO
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cols="2" cellspacing="0" cellpadding="0">
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TIFFOpen(3TIFF), TIFFReadRawTile(3TIFF),
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TIFFReadTile(3TIFF), libtiff(3TIFF)
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Libtiff library home page:
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http://www.simplesystems.org/libtiff/
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</body>
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</html>
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