Copyright (C) 2000-2012 |
Manpages ppmtoicrSection: User Commands (1)Updated: 30 July 1990 Index Return to Main Contents NAMEppmtoicr - convert a portable pixmap into NCSA ICR formatSYNOPSISppmtoicr [-windowname name] [-expand expand] [-display display] [-rle] [ppmfile]DESCRIPTIONReads a portable pixmap file as input. Produces an NCSA Telnet Interactive Color Raster graphic file as output. If ppmfile is not supplied, 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
EXAMPLESTo display a ppm file using the protocol:ppmtoicr ppmfileThis 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 filenameTo 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 BUGSThe 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 ALSOppm(5)NCSA Telnet for the Macintosh, University of Illinois at Urbana-Champaign (1989) AUTHORCopyright (C) 1990 by Kanthan Pillay (svpillay@Princeton.EDU), Princeton University Computing and Information Technology.
IndexThis document was created by man2html, using the manual pages. Time: 03:51:27 GMT, November 05, 2024 |