2004-11-11 09:39:16 -05:00
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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 QUERY 3TIFF "October 29, 2004" "libtiff"
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.SH NAME
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TIFFCurrentRow,
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TIFFCurrentStrip,
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TIFFCurrentTile,
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TIFFCurrentDirectory,
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TIFFLastDirectory,
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TIFFFileno,
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TIFFFileName,
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TIFFGetMode,
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TIFFIsTiled,
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TIFFIsByteSwapped,
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TIFFIsUpSampled,
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TIFFIsMSB2LSB,
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TIFFGetVersion
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\- query routines
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.SH SYNOPSIS
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.B "#include <tiffio.h>"
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.sp
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.BI "uint32 TIFFCurrentRow(TIFF* " tif ")"
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.br
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.BI "tstrip_t TIFFCurrentStrip(TIFF* " tif ")"
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.br
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.BI "ttile_t TIFFCurrentTile(TIFF* " tif ")"
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.br
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.BI "tdir_t TIFFCurrentDirectory(TIFF* " tif ")"
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.br
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.BI "int TIFFLastDirectory(TIFF* " tif ")"
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.br
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.BI "int TIFFFileno(TIFF* " tif ")"
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.br
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.BI "char* TIFFFileName(TIFF* " tif ")"
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.br
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.BI "int TIFFGetMode(TIFF* " tif ")"
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.br
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.BI "int TIFFIsTiled(TIFF* " tif ")"
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.br
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.BI "int TIFFIsByteSwapped(TIFF* " tif ")"
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.br
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.BI "int TIFFIsUpSampled(TIFF* " tif ")"
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.br
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.BI "int TIFFIsMSB2LSB(TIFF* " tif ")"
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.br
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.BI "const char* TIFFGetVersion(void)"
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.SH DESCRIPTION
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The following routines return status information about an open
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.SM TIFF
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file.
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.PP
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.IR TIFFCurrentDirectory
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returns the index of the current directory (directories are numbered starting
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at 0). This number is suitable for use with the
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.IR TIFFSetDirectory
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routine.
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.PP
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.IR TIFFLastDirectory
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returns a non-zero value if the current directory is the last directory in the
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file; otherwise zero is returned.
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.PP
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.IR TIFFCurrentRow ,
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.IR TIFFCurrentStrip ,
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and
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.IR TIFFCurrentTile ,
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return the current row, strip, and tile, respectively, that is being read or
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written. These values are updated each time a read or write is done.
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.PP
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.IR TIFFFileno
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returns the underlying file descriptor used to access the
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.SM TIFF
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image in the filesystem.
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.PP
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.IR TIFFFileName
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returns the pathname argument passed to
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.IR TIFFOpen
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or
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.IR TIFFFdOpen .
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.PP
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.IR TIFFGetMode
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returns the mode with which the underlying file was opened. On
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.SM UNIX
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systems, this is the value passed to the
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.IR open (2)
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system call.
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.PP
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.IR TIFFIsTiled
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returns a non-zero value if the image data has a tiled organization. Zero is
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returned if the image data is organized in strips.
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.PP
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.IR TIFFIsByteSwapped
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returns a non-zero value if the image data was in a different byte-order than
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the host machine. Zero is returned if the TIFF file and local host byte-orders
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2017-12-31 09:42:52 -05:00
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are the same. Note that TIFFReadTile(), TIFFReadEncodedStrip() and
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2004-11-11 09:39:16 -05:00
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TIFFReadScanline() functions already normally perform byte swapping to local
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host order if needed.
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.PP
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.I TIFFIsUpSampled
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returns a non-zero value if image data returned through the read interface
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routines is being up-sampled. This can be useful to applications that want to
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calculate I/O buffer sizes to reflect this usage (though the usual strip and
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tile size routines already do this).
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.PP
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.I TIFFIsMSB2LSB
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returns a non-zero value if the image data is being returned with bit 0 as the
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most significant bit.
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.PP
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.IR TIFFGetVersion
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returns an
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.SM ASCII
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string that has a version stamp for the
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.SM TIFF
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library software.
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.SH DIAGNOSTICS
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None.
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.SH "SEE ALSO"
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.IR libtiff (3TIFF),
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.IR TIFFOpen (3TIFF),
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.IR TIFFFdOpen (3TIFF)
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