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Re: [css3-color] Algorithm for opacity needs defining.

From: L. David Baron <dbaron@dbaron.org>
Date: Mon, 12 May 2008 16:28:54 -0700
To: David Woolley <david@djwhome.demon.co.uk>
Cc: www-style@w3.org
Message-ID: <20080512232854.GA2590@pickering.dbaron.org>

On Monday 2003-04-28 21:29 +0100, David Woolley wrote:
> I can't see anything in the comments about the definition of opacity 
> being a cut and paste, out of context, from the SVG specification.
> The algorithm needs to be specified.  In particular, it is not a linear
> combination of the foreground and background, because of gamma considerations.

This has been recorded as
http://csswg.inkedblade.net/spec/css3-color#issue-9 and should be
fixed in the editor's draft at
http://dev.w3.org/csswg/css3-color/#transparency and
http://dev.w3.org/csswg/css3-color/#alpha through the reference in
the latter section to SVG 1.1, section 14.2.

If this doesn't address your comment, could you let us know within
two weeks, if possible?

-David

-- 
L. David Baron                                 http://dbaron.org/
Mozilla Corporation                       http://www.mozilla.com/
Received on Monday, 12 May 2008 23:29:28 GMT

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