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From: mouse@LARRY.MCRCIM.MCGILL.EDU
Newsgroups: comp.windows.x
Subject: Re:  picture display under X
Message-ID: <9008290805.AA01030@Larry.McRCIM.McGill.EDU>
Date: 29 Aug 90 08:05:28 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 19

> I am using OpenWindows(X11) on a SparcStation 1+ and I'd like to
> display a 512x512 picture with 8-bit pixel values, but I can't find
> any X function which will do the trick.  Setting the color map is
> easy, but how do you display a row or region of pixels which is
> stored as, say, a char array?  It seems like using either an image or
> pixmap would be required, but the documentation on the formats is
> unclear -- if XYPixmap really requires separating all the bits out
> into bitplanes, that seems rather cumbersome and inefficient.

Right; that's what ZPixmap format is for.

I would suggest creating an XImage structure pointing to your data and
using XPutImage (either directly to a window or to a pixmap which you
then XCopyArea to the window - trading speed for server-side memory).

					der Mouse

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