battle@alphard.cs.utk.edu (David Battle) (12/14/89)
There appears to be a bug in DEC's X server for the DECStation 3100. Try an XGetImage from a pixmap with the image's width and height equal to 33. At least under some circumstances this can cause garbage to be *written* into the *pixmap*. Changing the GetImage size from 33 to 32 will "fix" the problem. I don't know if this bug exists on other servers. I haven't observed this problem with windows, but that doesn't mean it doesn't exist there also. -David L. Battle battle@battle.esd.ornl.gov
joel@pandora.pa.dec.com (Joel McCormack) (12/16/89)
> There appears to be a bug in DEC's X server for the DECStation 3100. Try > an XGetImage from a pixmap with the image's width and height equal to 33. > At least under some circumstances this can cause garbage to be *written* into > the *pixmap*. Changing the GetImage size from 33 to 32 will "fix" the > problem. There was one line of code in GetImage which read ``*psrc = *pdst'' rather than the other way 'round. This is fixed in UWS 2.2. This is actually a pretty old bug; it may have been fixed in UWS 2.1, but I don't remember. - Joel McCormack (decwrl!joel, joel@decwrl.dec.com)