Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!EXPO.LCS.MIT.EDU!rws
From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: Xqvss, Xwd, Xpr, & pbm problem
Message-ID: <8903202236.AA01205@EXPIRE.LCS.MIT.EDU>
Date: 20 Mar 89 22:36:23 GMT
References: <415@mahendo.Jpl.Nasa.Gov>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 19


    `xpr -density 300 -device ps' the bitmap in the PostScript output is an
    all-black window (i.e., all 0's in the bitmap segment of the PostScript).

Right, because xpr is stupidly just choosing a fixed bit plane (usually the
wrong one) to output.

    One thing that is confusing in the documentation is that the `xwd' man page
    says that one needs to use XYPixmap dump format:

    Yet, the `xpr' man page seems to contradict this:

XY and Z are equivalent for 1-bit images, and xpr will eat either.  For
N-bit images, the R3 xpr will only eat XY format.

    I thought that `xpr' would convert any input
    color to an appropriate white/black value ...

It will in R4 (our current internal version does).