Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!hplabs!hp-pcd!hpcvlx!robertw
From: robertw@hpcvlx.HP.COM (Robert B. Williams)
Newsgroups: comp.windows.x
Subject: Re: color bitmap files
Message-ID: <100920080@hpcvlx.HP.COM>
Date: 6 Jun 89 22:47:22 GMT
References: <320@celit.UUCP>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 23

As usual our dumb mailer can't find your address:

  >without the X library functions.  I found XWDFile.h and xwd.
  >That's a program and not a library function (I think ???).
Right, xwd is a client. It has a companion client xwud which will
undump the file xwd writes.  The R3 version (from HP anyway) will convert the
colors it finds in the included colormap (see XWDFile.h) to a set of
colors in a colormap matching the target visual.
  >Is there a way to store and retrieve arbitrary color bitmaps
  >in files? 
No such thing as a color bitmap.  If its more than just on or off its a
pixmap.  They aren't the same, and the xlib tools for handling them
aren't the same.  (See Pgming Xlib 6.7)
  >the colormap in the file and have the display program try to
  >set the colormap to the one specified in the file (and, of
  >course, restore it after it's done).
Exactly what xwud does.  Of course its the window manager that actually
installs the colormap, but xwud defines one from the data in the file.

	  >--Bill (wannabegraphicsguru) Davidson

 Robert Williams robertw@hp-pcd.HP.COM
503-750-2818, Corvallis Workstation Operation