TIFFGT(1)TIFFGT(1)NAMEtiffgt - display an image stored in a TIFF file (Silicon
Graphics version)
SYNOPSIStiffgt [ options ] input.tif ...
DESCRIPTIONtiffgt displays one or more images stored using the Tag
Image File Format, Revision 6.0. Each image is placed in
a fixed size window that the user must position on the
display (unless configured otherwise through X defaults).
If the display has fewer than 24 bitplanes, or if the
image does not warrant full color, then RGB color values
are mapped to the closest values that exist in the col
ormap (this is done using the rgbi routine found in the
graphics utility library -lgutil.)
tiffgt correctly handles files with any of the following
characteristics:
BitsPerSample 1, 2, 4, 8, 16
SamplesPerPixel 1, 3, 4 (the 4th sample is ignored)
PhotometricInterpretation 0 (min-is-white), 1 (min-is-black), 2 (RGB), 3 (palette), 6 (YCbCr)
PlanarConfiguration 1 (contiguous), 2 (separate)
Orientation 1 (top-left), 4 (bottom-left)
Data may be organized as strips or tiles and may be com
pressed with any of the compression algorithms supported
by the libtiff(3) library.
For palette images (PhotomatricInterpretation=3), tiffgt
inspects the colormap values and assumes either 16-bit or
8-bit values according to the maximum value. That is, if
no colormap entry greater than 255 is found, tiffgt
assumes the colormap has only 8-bit values; otherwise it
assumes 16-bit values. This inspection is done to handle
old images written by previous (incorrect) versions of
libtiff.
tiffgt can be used to display multiple images one-at-a-
time. The left mouse button switches the display to the
first image in the next file in the list of files speci
fied on the command line. The right mouse button switches
to the first image in the previous file in the list. The
middle mouse button causes the first image in the first
file specified on the command line to be displayed. In
addition the following keyboard commands are recognized:
b Use a PhotometricIntepretation of MinIsBlack in
displaying the current image.
l Use a FillOrder of lsb-to-msb in decoding the cur
rent image.
m Use a FillOrder of msb-tolmsb in decoding the cur
rent image.
c Use a colormap visual to display the current image.
r Use a true color (24-bit RGB) visual to display the
current image.
w Use a PhotometricIntepretation of MinIsWhite in
displaying the current image.
W Toggle (enable/disable) display of warning messages
from the TIFF library when decoding images.
E Toggle (enable/disable) display of error messages
from the TIFF library when decoding images.
z Reset all parameters to their default settings
(FillOrder, PhotometricInterpretation, handling of
warnings and errors).
PageUp Display the previous image in the current file or
the last image in the previous file.
PageDown
Display the next image in the current file or the
first image in the next file.
Home Display the first image in the current file.
End Display the last image in the current file (unim
plemented).
OPTIONS-c Force image display in a colormap window.
-d Specify an image to display by directory number.
By default the first image in the file is dis
played. Directories are numbered starting at zero.
-e Enable reporting of error messages from the TIFF
library. By default tiffgt silently ignores images
that cannot be read.
-f Force tiffgt to run as a foreground process. By
default tiffgt will place itself in the background
once it has opened the requested image file.
-l Force the presumed bit ordering to be LSB to MSB.
-m Force the presumed bit ordering to be MSB to LSB.
-o Specify an image to display by directory offset.
By default the first image in the file is dis
played. Directories offsets may be specified using
C-style syntax; i.e. a leading ``0x'' for hexadeci
mal and a leading ``0'' for octal.
-p Override the value of the PhotometricInterpretation
tag; the parameter may be one of: miniswhite, min_
isblack, rgb, palette, mask, separated, ycbcr, and
cielab.
-r Force image display in a full color window.
-s Stop on the first read error. By default all
errors in the input data are ignored and tiffgt
does it's best to display as much of an image as
possible.
-w Enable reporting of warning messages from the TIFF
library. By default tiffgt ignores warning mes
sages generated when reading an image.
-v Place information in the title bar describing what
type of window (full color or colormap) is being
used, the name of the input file, and the directory
index of the image (if non-zero). By default, the
window type is not shown in the title bar.
BUGS
Images wider and taller than the display are silently
truncated to avoid crashing old versions of the window
manager.
SEE ALSOtiffdump(1), tiffinfo(1), tiffcp(1), libtiff(3)
October 15, 1995 TIFFGT(1)
