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libsdl2_image/external/tiff-4.0.9/man/tiffgt.1
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libsdl2_image/external/tiff-4.0.9/man/tiffgt.1
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.\" $Id: tiffgt.1,v 1.5 2016-09-25 20:05:52 bfriesen 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 TIFFGT 1 "September 20, 2005" "libtiff"
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.SH NAME
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tiffgt \- display an image stored in a
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.SM TIFF
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file (Silicon Graphics version)
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.SH SYNOPSIS
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.B tiffgt
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[
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.I options
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]
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.I "input.tif ..."
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.SH DESCRIPTION
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.I tiffgt
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displays one or more images stored using the
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Tag Image File Format, Revision 6.0.
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Each image is placed in a fixed size window that the
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user must position on the display (unless configured
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otherwise through X defaults).
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If the display has fewer than 24 bitplanes, or if the
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image does not warrant full color, then
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.SM RGB
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color values are mapped to the closest values that exist in
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the colormap (this is done using the
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.I rgbi
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routine found in the graphics utility library
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.BR \-lgutil .)
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.PP
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.I tiffgt
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correctly handles files with any of the following characteristics:
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.sp .5
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.in +0.5i
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.ta \w'\fIPhotometricInterpretation\fP 'u
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.nf
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\fIBitsPerSample\fP 1, 2, 4, 8, 16
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\fISamplesPerPixel\fP 1, 3, 4 (the 4th sample is ignored)
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\fIPhotometricInterpretation\fP 0 (min-is-white), 1 (min-is-black), 2 (RGB), 3 (palette), 6 (YCbCr)
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\fIPlanarConfiguration\fP 1 (contiguous), 2 (separate)
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\fIOrientation\fP 1 (top-left), 4 (bottom-left)
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.fi
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.in -0.5i
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.sp .5
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Data may be organized as strips or tiles and may be
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compressed with any of the compression algorithms supported
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by the
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.IR libtiff (3)
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library.
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.PP
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For palette images (\c
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.IR PhotometricInterpretation =3),
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.I tiffgt
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inspects the colormap values and assumes either 16-bit
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or 8-bit values according to the maximum value.
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That is, if no colormap entry greater than 255 is found,
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.I tiffgt
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assumes the colormap has only 8-bit values; otherwise
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it assumes 16-bit values.
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This inspection is done to handle old images written by
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previous (incorrect) versions of
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.IR libtiff .
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.PP
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.I tiffgt
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can be used to display multiple images one-at-a-time.
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The left mouse button switches the display to the first image in the
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.I next
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file in the list of files specified on the command line.
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The right mouse button switches to the first image in the
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.I previous
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file in the list.
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The middle mouse button causes the first image in the first file
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specified on the command line to be displayed.
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In addition the following keyboard commands are recognized:
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.TP
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.B b
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Use a
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.I PhotometricInterpretation
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of MinIsBlack in displaying the current image.
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.TP
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.B l
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Use a
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.I FillOrder
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of lsb-to-msb in decoding the current image.
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.TP
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.B m
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Use a
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.I FillOrder
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of msb-to-lsb in decoding the current image.
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.TP
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.B c
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Use a colormap visual to display the current image.
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.TP
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.B r
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Use a true color (24-bit RGB) visual to display the current image.
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.TP
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.B w
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Use a
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.I PhotometricInterpretation
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of MinIsWhite in displaying the current image.
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.TP
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.B W
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Toggle (enable/disable) display of warning messages from the
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.SM TIFF
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library when decoding images.
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.TP
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.B E
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Toggle (enable/disable) display of error messages from the
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.SM TIFF
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library when decoding images.
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.TP
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.B z
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Reset all parameters to their default settings (\c
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.IR FillOrder ,
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.IR PhotometricInterpretation ,
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handling of warnings and errors).
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.TP
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.B PageUp
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Display the previous image in the current file or the last
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image in the previous file.
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.TP
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.B PageDown
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Display the next image in the current file or the first image
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in the next file.
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.TP
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.B Home
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Display the first image in the current file.
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.TP
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.B End
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Display the last image in the current file (unimplemented).
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.SH OPTIONS
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.TP
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.B \-c
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Force image display in a colormap window.
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.TP
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.B \-d
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Specify an image to display by directory number.
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By default the first image in the file is displayed.
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Directories are numbered starting at zero.
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.TP
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.B \-e
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Enable reporting of error messages from the
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.SM TIFF
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library.
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By default
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.I tiffgt
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silently ignores images that cannot be read.
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.TP
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.B \-f
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Force
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.I tiffgt
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to run as a foreground process.
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By default
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.I tiffgt
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will place itself in the background once it has opened the
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requested image file.
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.TP
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.B \-l
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Force the presumed bit ordering to be
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.SM LSB
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to
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.SM MSB.
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.TP
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.B \-m
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Force the presumed bit ordering to be
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.SM MSB
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to
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.SM LSB.
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.TP
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.B \-o
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Specify an image to display by directory offset.
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By default the first image in the file is displayed.
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Directories offsets may be specified using C-style syntax;
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i.e. a leading ``0x'' for hexadecimal and a leading ``0'' for octal.
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.TP
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.B \-p
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Override the value of the
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.I PhotometricInterpretation
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tag; the parameter may be one of:
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.BR miniswhite ,
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.BR minisblack ,
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.BR rgb ,
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.BR palette ,
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.BR mask ,
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.BR separated ,
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.BR ycbcr ,
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and
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.BR cielab .
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.TP
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.B \-r
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Force image display in a full color window.
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.TP
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.B \-s
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Stop on the first read error.
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By default all errors in the input data are ignored and
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.I tiffgt
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does it's best to display as much of an image as possible.
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.TP
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.B \-w
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Enable reporting of warning messages from the
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.SM TIFF
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library.
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By default
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.I tiffgt
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ignores warning messages generated when reading an image.
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.TP
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.B \-v
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Place information in the title bar describing
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what type of window (full color or colormap) is being
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used, the name of the input file, and the directory
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index of the image (if non-zero).
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By default, the window type is not shown in the title bar.
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.SH BUGS
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Images wider and taller than the display are silently truncated to avoid
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crashing old versions of the window manager.
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.SH "SEE ALSO"
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.BR tiffdump (1),
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.BR tiffinfo (1),
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.BR tiffcp (1),
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.BR libtiff (3TIFF)
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.PP
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Libtiff library home page:
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.BR http://www.simplesystems.org/libtiff/
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