Path: utzoo!attcan!uunet!maverick.ksu.ksu.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!thompson
From: thompson@ux1.cso.uiuc.edu
Newsgroups: comp.windows.x
Subject: Re:
Message-ID: <22700026@ux1.cso.uiuc.edu>
Date: 19 Oct 90 20:13:00 GMT
References: <1639@<1990Oct19>
Lines: 41
Nf-ID: #R:<1990Oct19:1639:ux1.cso.uiuc.edu:22700026:000:2086
Nf-From: ux1.cso.uiuc.edu!thompson    Oct 19 15:13:00 1990


I've been misquoted!   I have to clear my name.....  

Paul Scowen writes:

>Has anybody out there tried to use basic progs like xloadimage and ximage under
>the R4 twm?  I'm having problems with these pieces of software writing to the
>colormap.  The curious thing about it is that the behavior is intermittent, in
>that sometimes the software will run fine, and then the colormap access cuts
>ut after a certain time (usually about 20 mins); or the software will never be
>able to write to the colormap.  I've been in touch with Dave Thompson at NCSA
>and he's of the opinion that twm is not ICCCM compliant and that's the problem.
>The X gurus here at Rice think otherwise, and that there is some flag you can
>set in a .twmrc file that will make the colormap accessible.
>
>Department of Space Physics
>Rice University
>(uk1@spacsun.rice.edu)

I have never said that twm is not ICCCM compliant.  
The R4 twm has always appeared to handle colormap setting the ICCCM way.  
twm expects a client program to set a colormap attribute on a window
with XSetWindowColormap or equiv.  The twm distributed in the core
R4 distribution (patch level 0) allowed clients to set colormaps only
by the ICCCM way.  If a client tried to do an XInstallColormap, twm
would sense the colormap change event and then install the system colormap 
regardless of the colormap attribute associated with the window.  To maintain
backward compatibility with window managers, ximage set colormaps
the ICCCM way and the pre ICCCM way.  This didn't work with the old
twm.  Patch level 8 for the R4 distribution fixes the above mentioned
problem so that clients may do this wm backward compatibility thing with 
colormaps setting.  I have not experienced any problems with twm
patch level 8.

Dave Thompson

National Center for Supercomputing Applications	
4035 Beckman, Drawer 25	      Internet: davet@ncsa.uiuc.edu
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voice (217) 244-1957          CSNet: davet%zaphod@uiuc.csnet