12-03-2001
Hello PxT,
thanks for your quick reply.
I forgot to tell you that I'm not telnetting from another UNIX machine, but from a Windows system. As far as I know Windows' Telnet does not have these switches (I have to use a Telnet program with SSH anyway, because my host refuses insecure Telnet connections.
Miguel
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LEARN ABOUT OPENSOLARIS
ppmtoicr
ppmtoicr(1) General Commands Manual ppmtoicr(1)
NAME
ppmtoicr - convert a portable pixmap into NCSA ICR format
SYNOPSIS
ppmtoicr [-windowname name] [-expand expand] [-display display] [-rle] [ppmfile]
DESCRIPTION
Reads a portable pixmap file as input. Produces an NCSA Telnet Interactive Color Raster graphic file as output. If ppmfile is not sup-
plied, ppmtoicr will read from standard input.
Interactive Color Raster (ICR) is a protocol for displaying raster graphics on workstation screens. The protocol is implemented in NCSA
Telnet for the Macintosh version 2.3. The ICR protocol shares characteristics of the Tektronix graphics terminal emulation protocol. For
example, escape sequences are used to control the display.
ppmtoicr will output the appropriate sequences to create a window of the dimensions of the input pixmap, create a colormap of up to 256
colors on the display, then load the picture data into the window.
Note that there is no icrtoppm tool - this transformation is one way.
OPTIONS
-windownamename
Output will be displayed in name (Default is to use ppmfile or "untitled" if standard input is read.)
-expandexpand Output will be expanded on display by factor expand (For example, a value of 2 will cause four pixels to be displayed for
every input pixel.)
-displaydisplay
Output will be displayed on screen numbered display
-rle Use run-length encoded format for display. (This will nearly always result in a quicker display, but may skew the colormap.)
EXAMPLES
To display a ppm file using the protocol:
ppmtoicr ppmfile
This will create a window named ppmfile on the display with the correct dimensions for ppmfile, create and download a colormap of up to 256
colors, and download the picture into the window. The same effect may be achieved by the following sequence:
ppmtoicr ppmfile > filename
cat filename
To display a GIF file using the protocol in a window titled after the input file, zoom the displayed image by a factor of 2, and run-length
encode the data:
giftopnm giffile | ppmtoicr -w giffile -r -e 2
BUGS
The protocol uses frequent fflush calls to speed up display. If the output is saved to a file for later display via cat, drawing will be
much slower. In either case, increasing the Blocksize limit on the display will speed up transmission substantially.
SEE ALSO
ppm(5)
NCSA Telnet for the Macintosh, University of Illinois at Urbana-Champaign (1989)
AUTHOR
Copyright (C) 1990 by Kanthan Pillay (svpillay@Princeton.EDU), Princeton University Computing and Information Technology.
30 July 1990 ppmtoicr(1)