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From: arne@rrzbu.hanse.de (Arne Ludwig)
Newsgroups: comp.windows.x
Subject: creating n-bit Pixmaps on other-than-n-bit screens
Message-ID: <1597@rrzbu.UUCP>
Date: 24 Jul 90 01:35:33 GMT
Lines: 28

R3 server. R4 Xlib. (although this doesn't matter)

xdpyinfo output:
...
supported pixmap formats:
...
    depth 8, bits_per_pixel 8, scanline_pad 32
...
number of screens:    1

screen #0:
  depths (1):    4


So it won't create Pixmaps with depths other than 4 (and 1), i.e.
	pix8 = XCreatePixmap(dpy, drawable_on_screen_0, 64, 64, 8);
fails with BadValue. Fine.

Does this mean, the server supports 8 bit Pixmaps but there is no
screen that does?? Why should anybody do that?
Is this a problem with my particular server or with my understanding
of the protocol? Can I get around that restriction?

PS.
I won't need to CopyArea that Pixmap, I just need to GetImage from it.
What I really need is a way to convert a depth 8 XImage portably.
-- 
Arne Ludwig		arne@rrzbu.hanse.de	...uunet!??????!rrzbu!arne