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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?


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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