Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!EXPO.LCS.MIT.EDU!jim
From: jim@EXPO.LCS.MIT.EDU
Newsgroups: comp.windows.x
Subject: Re: Contents of windows
Message-ID: <8905052222.AA01625@expo.lcs.mit.edu>
Date: 5 May 89 22:22:11 GMT
References: <4089@ficc.uu.net>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: X Consortium, MIT Laboratory for Computer Science
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> And any half-bright implementation of layers on a machine with that deep
> a display should track the colors used. An XTERM window uses at most four
> colors (fg, bg, cursor, and pointer), so if it backs up more than two
> bitplanes it's horribly inefficient.

Again, this mixes up number of colors (3, pointer is stored separately) with
the number of bits in the union of the necessary (and arbitrary) pixel values.


> So, it's really a quality of implementation issue.

No, it's really a boolean arithmetic issue.