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From: doug@genmri.UUCP (Doug Becker)
Newsgroups: comp.windows.x
Subject: XView dynamic CMSes and real colormap indices
Message-ID: <9101301830.AA22946@genmri.sane.COM>
Date: 30 Jan 91 18:30:03 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 26

Is a dynamic XView CMS guaranteed to contain contiguous *real* indices into
the colormap?  That is, given the following code fragment:

        cms = (Cms) xv_create (NULL, CMS,
                               CMS_TYPE, XV_DYNAMIC_CMS,
                               CMS_SIZE, size,
                               NULL);

        pixels = (unsigned long *) xv_get (cms, CMS_INDEX_TABLE);

Will it hold that for size > 1, and for all read/write displays of
appropriate depth (esp. 8-bit PseudoColor),

    pixels[0] = i, pixels[1] = i + 1, ... , pixels[size - 1] = i + size - 1 ?

This is the behavior I've noted thus far (in my limited environment), but I
was unable to find any definitive statement about this in the XView
documentation (O'Reilly Volume 7).

I'm using XView 2.0 on a SPARCstation 1.

-- 

Doug Becker
doug@nmri.ge.com
crdgw1.ge.com!sane!doug