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authorJörg Frings-Fürst <debian@jff-webhosting.net>2015-05-02 10:09:28 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2015-05-02 10:09:28 +0200
commitda4a717ddcd6ba5b5b0819aabbe49fcd5f77ae4d (patch)
tree86a75831be5de12584225fdd94bec47a73a455a8 /tiff/man/TIFFReadScanline.3tiff
parent63128e407a6ee7afd31e013dc55d5dcbfab0f6a9 (diff)
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-.\" $Id: TIFFReadScanline.3tiff,v 1.2 2005/11/02 11:07:18 dron Exp $
-.\"
-.\" Copyright (c) 1988-1997 Sam Leffler
-.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
-.\"
-.\" Permission to use, copy, modify, distribute, and sell this software and
-.\" its documentation for any purpose is hereby granted without fee, provided
-.\" that (i) the above copyright notices and this permission notice appear in
-.\" all copies of the software and related documentation, and (ii) the names of
-.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
-.\" publicity relating to the software without the specific, prior written
-.\" permission of Sam Leffler and Silicon Graphics.
-.\"
-.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
-.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
-.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
-.\"
-.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
-.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
-.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
-.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
-.\" OF THIS SOFTWARE.
-.\"
-.if n .po 0
-.TH TIFFReadScanline 3TIFF "October 15, 1995" "libtiff"
-.SH NAME
-TIFFReadScanline \- read and decode a scanline of data from an open
-.SM TIFF
-file
-.SH SYNOPSIS
-.B "#include <tiffio.h>"
-.sp
-.BI "int TIFFReadScanline(TIFF *" tif ", tdata_t " buf ", uint32 " row ", tsample_t " sample ")"
-.SH DESCRIPTION
-Read the data for the specified row into the (user supplied) data buffer
-.IR buf .
-The data are returned decompressed and, in the native byte- and bit-ordering,
-but are otherwise packed (see further below). The buffer must be large enough
-to hold an entire scanline of data. Applications should call the routine
-.IR TIFFScanlineSize
-to find out the size (in bytes) of a scanline buffer.
-The
-.I row
-parameter is always used by
-.IR TIFFReadScanline ;
-the
-.I sample
-parameter is used only if data are organized in separate planes (\c
-.IR PlanarConfiguration =2).
-.SH NOTES
-The library attempts to hide bit- and byte-ordering differences between the
-image and the native machine by converting data to the native machine order.
-Bit reversal is done if the
-.I FillOrder
-tag is opposite to the native machine bit order. 16- and 32-bit samples are
-automatically byte-swapped if the file was written with a byte order opposite
-to the native machine byte order,
-.PP
-In C++ the
-.I sample
-parameter defaults to 0.
-.SH "RETURN VALUES"
-.IR TIFFReadScanline
-returns \-1 if it detects an error; otherwise 1 is returned.
-.SH DIAGNOSTICS
-All error messages are directed to the
-.IR TIFFError (3TIFF)
-routine.
-.PP
-.BR "Compression algorithm does not support random access" .
-Data was requested in a non-sequential order from a file that uses a
-compression algorithm and that has
-.I RowsPerStrip
-greater than one.
-That is, data in the image is stored in a compressed form, and with multiple
-rows packed into a strip. In this case, the library does not support random
-access to the data. The data should either be accessed sequentially, or the
-file should be converted so that each strip is made up of one row of data.
-.SH BUGS
-Reading subsampled YCbCR data does not work correctly because, for
-.IR PlanarConfiguration =2
-the size of a scanline is not calculated on a per-sample basis, and for
-.IR PlanarConfiguration =1
-the library does not unpack the block-interleaved samples; use the strip- and
-tile-based interfaces to read these formats.
-.SH "SEE ALSO"
-.BR TIFFOpen (3TIFF),
-.BR TIFFReadEncodedStrip (3TIFF),
-.BR TIFFReadRawStrip (3TIFF),
-.BR libtiff (3TIFF)
-.PP
-Libtiff library home page:
-.BR http://www.remotesensing.org/libtiff/