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RE: blending, group rendering

From: Dave J Woolley <david.woolley@bts.co.uk>
Date: Mon, 19 Feb 2001 16:06:48 -0000
Message-ID: <81E4A2BC03CED111845100104B62AFB50102A4B4@stagecoach.bts.co.uk>
To: "'www-svg@w3.org'" <www-svg@w3.org>
> From:	Stephane Conversy [SMTP:conversy@emn.fr]
> 
> since both of the rects have an opacity of 0.5, and the alpha
> values should follow the equation Ca'=1-(1-Ea)x(1-Ca) (CR p267).
	[DJW:]  
	This refers to
<http://www.w3.org/TR/2000/CR-SVG-20001102/masking.html#SimpleAlphaBlending>
; I don't 
	believe the PDF version is normative, so the page
	numbers are not guaranteed.  The section is 14.2.


> Obviously, I should have missed something...
	[DJW:]  
	Have you converted everything to gamma 1.0 before 
	computing the colours.  The spec does seem to require
	this, although it does not stand out well.  The default
	gamma is 2.2.

>   [DJW:]  
> 
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Received on Monday, 19 February 2001 11:07:08 GMT

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