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- Xref: sparky comp.windows.open-look:3661 comp.lang.postscript:4526 comp.windows.x.apps:886
- Newsgroups: comp.windows.open-look,comp.lang.postscript,comp.windows.x.apps
- Path: sparky!uunet!gumby!destroyer!ncar!ozzel.hao.ucar.edu!sitongia
- From: sitongia@hao.ucar.edu (Leonard Sitongia)
- Subject: Looking for PostScript previewer rendering 8-bits under X
- Message-ID: <1992Aug31.172121.14768@ncar.ucar.edu>
- Keywords: postscript pageview ghostview
- Sender: news@ncar.ucar.edu (USENET Maintenance)
- Reply-To: sitongia@hao.ucar.edu (Leonard Sitongia)
- Organization: High Altitude Observatory/NCAR, Boulder CO
- Distribution: usa
- Date: Mon, 31 Aug 1992 17:21:21 GMT
- Lines: 40
-
- (The platform context is Sun workstation running SunOS 4.1.1 and
- OpenWindows, but we have access to Motif, standard MIT X11R4/R5 and SGI's.)
-
- A user here would like to find a previewer which supports the following
- features.
-
- The user says:
-
- > Does anyone know how to view 8-bit PostScript images on any of
- > the HAO hardware (and see all 8 bits worth of grayscale)? I was
- > told that all of our printers are only 4-bit. Pageview on the Suns
- > uses only 4 bits, and psview on the SGI's appears equally limiting.
- > A file that used only 4 bits in pageview showed its full range on a
- > Mips machine at RSI. I have not found any such previewer on our Macs.
- >
- > I would like to add to the list of desired features.
- > The PS previewer should handle (ideally):
- > 1. 8-bit grayscale
- > 2. 8-bit color
- > 3. landscape and protrait modes
- >
-
- In my own investigation of Sun pageview and GNU ghostview, that:
-
- ghostscript displays the postscript-device's view of the representation.
- (i.e., shows the halftone/dithered image like one would get on a
- color postscript printer). The user wants the images on the previewed
- page to be rendered directly in 8-bit pixels.
-
- pageview doesn't use the colormap defined in the postscript document.
- pageview doesn't redraw the window frame around the image when it is
- switched to landscape.
-
- Is there an option to ghostscript to select a different device, one
- that can do 8bit display?
-
- --
- --Leonard E. Sitongia HAO System Manager
- sitongia@ncar.ucar.edu voice: (303)497-1509 fax: (303)497-1589
- High Altitude Observatory P.O. Box 3000 Boulder CO 80307
-