Path: utzoo!utgpu!watmath!clyde!att!rutgers!cmcl2!nrl-cmf!ukma!uflorida!mailrus!ncar!boulder!sunybcs!lively From: lively@sunybcs.uucp (Richard S. Lively) Newsgroups: comp.graphics Subject: Color lookup tables Message-ID: <3048@cs.Buffalo.EDU> Date: 2 Dec 88 20:23:17 GMT Sender: nobody@cs.Buffalo.EDU Reply-To: lively@sunybcs.UUCP (Richard S. Lively) Distribution: na Organization: SUNY/Buffalo Computer Science Lines: 20 Suppose that you are using a multiple window environment on a color workstation. You are using a single window which requires the use of 150 entries in the color lookup table and now you want to open another window which requires another 150 entries in the lookup table (potentially there will be no similar colors in the separate windows). However, there are not enough available slots in the lookup table to support that many entries. How can you maintain color integrity in both windows? When I asked how different windowing environments handle this, I received the following responses: SunView - any window except active window is black X - does not allow creation of the second window Mac II - separate lookup table for each window (but not exactly perfect) Are these answers correct? If so, what design decisions prompted these choices? Is there any reason that each window can't have a separate lookup table which can become active or inactive dynamically in the middle of a scan line?