86 lines
3.0 KiB
Plaintext
86 lines
3.0 KiB
Plaintext
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.\" $Header: /cvs/maptools/cvsroot/libtiff/man/Attic/TIFFReadTile.3t,v 1.1 1999-07-27 21:50:27 mike Exp $
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.\"
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.\" Copyright (c) 1988-1997 Sam Leffler
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.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
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.\"
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.\" Permission to use, copy, modify, distribute, and sell this software and
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.\" its documentation for any purpose is hereby granted without fee, provided
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.\" that (i) the above copyright notices and this permission notice appear in
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.\" all copies of the software and related documentation, and (ii) the names of
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.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
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.\" publicity relating to the software without the specific, prior written
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.\" permission of Sam Leffler and Silicon Graphics.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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.\" OF THIS SOFTWARE.
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.\"
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.if n .po 0
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.TH TIFFReadTile 3T "December 16, 1991"
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.SH NAME
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TIFFReadTile \- read and decode a tile of data from an open
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.SM TIFF
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file
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.SH SYNOPSIS
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.B "#include <tiffio.h>"
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.br
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.B "tsize_t TIFFReadTile(TIFF* tif, tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t sample)"
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.SH DESCRIPTION
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Return the data for the tile
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.I containing
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the specified coordinates.
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The data placed in
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.I buf
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are returned decompressed and, typically, in the native byte-
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and bit-ordering, but are otherwise packed (see further below).
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The buffer must be large enough to hold an entire tile of data.
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Applications should call the routine
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.IR TIFFTileSize
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to find out the size (in bytes) of a tile buffer.
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The
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.I x
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and
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.I y
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parameters are always used by
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.IR TIFFReadTile .
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The
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.I z
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parameter is used if the image is deeper than 1 slice (\c
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.IR ImageDepth >1).
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The
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.I sample
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parameter is used only if data are organized in separate planes (\c
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.IR PlanarConfiguration =2).
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.SH NOTES
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The library attempts to hide bit- and byte-ordering differences
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between the image and the native machine by converting data
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to the native machine order.
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Bit reversal is done if the
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.I FillOrder
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tag is opposite to the native machine bit order.
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16- and 32-bit samples are automatically byte-swapped if the
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file was written with a byte order opposite to the native
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machine byte order,
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.SH "RETURN VALUES"
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.IR TIFFReadTile
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returns \-1 if it detects an error; otherwise the number of
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bytes in the decoded tile is returned.
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.SH DIAGNOSTICS
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All error messages are directed to the
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.IR TIFFError (3T)
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routine.
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.SH "SEE ALSO"
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.IR libtiff (3T),
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.IR TIFFCheckTile (3T),
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.IR TIFFComputeTile (3T),
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.IR TIFFOpen (3T),
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.IR TIFFReadEncodedTile (3T),
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.IR TIFFReadRawTile (3T)
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